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10222031231 = 19935128967
BaseRepresentation
bin10011000010100011…
…11101000101111111
3222101101112222201022
421201101331011333
5131413314444411
64410153334355
7511211555216
oct114121750577
928341488638
1010222031231
1143760853a5
121b934073bb
13c6b9b95b9
146cd83c07d
153ec619edb
hex26147d17f

10222031231 has 4 divisors (see below), whose sum is σ = 10227162192. Its totient is φ = 10216900272.

The previous prime is 10222031219. The next prime is 10222031297. The reversal of 10222031231 is 13213022201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13213022201 = 32094117489.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-10222031231 is a prime.

It is a super-2 number, since 2×102220312312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10222031531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562491 + ... + 2566476.

It is an arithmetic number, because the mean of its divisors is an integer number (2556790548).

Almost surely, 210222031231 is an apocalyptic number.

10222031231 is a deficient number, since it is larger than the sum of its proper divisors (5130961).

10222031231 is an equidigital number, since it uses as much as digits as its factorization.

10222031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5130960.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 10222031231 its reverse (13213022201), we get a palindrome (23435053432).

The spelling of 10222031231 in words is "ten billion, two hundred twenty-two million, thirty-one thousand, two hundred thirty-one".

Divisors: 1 1993 5128967 10222031231