Search a number
-
+
31442124331 = 196709246661
BaseRepresentation
bin11101010010000110…
…001011111000101011
310000011020220102001101
4131102012023320223
51003343140434311
622235545502231
72162110434652
oct352206137053
9100136812041
1031442124331
1112375294422
126115aa1977
132c710a22c7
141743ba4199
15c4053eec1
hex75218be2b

31442124331 has 8 divisors (see below), whose sum is σ = 33102040400. Its totient is φ = 29782715040.

The previous prime is 31442124323. The next prime is 31442124349. The reversal of 31442124331 is 13342124413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31442124331 - 23 = 31442124323 is a prime.

It is a super-2 number, since 2×314421243312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31442124331.

It is not an unprimeable number, because it can be changed into a prime (31442124431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4141 + ... + 250801.

It is an arithmetic number, because the mean of its divisors is an integer number (4137755050).

Almost surely, 231442124331 is an apocalyptic number.

31442124331 is a deficient number, since it is larger than the sum of its proper divisors (1659916069).

31442124331 is a wasteful number, since it uses less digits than its factorization.

31442124331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253389.

The product of its digits is 6912, while the sum is 28.

Adding to 31442124331 its reverse (13342124413), we get a palindrome (44784248744).

The spelling of 31442124331 in words is "thirty-one billion, four hundred forty-two million, one hundred twenty-four thousand, three hundred thirty-one".

Divisors: 1 19 6709 127471 246661 4686559 1654848649 31442124331