10305021231 has 16 divisors (see below), whose sum is σ = 15268741120. Its totient is φ = 6869094840.

The previous prime is 10305021217. The next prime is 10305021283. The reversal of 10305021231 is 13212050301.

10305021231 is a `hidden beast` number, since 10 + 30 + 502 + 123 + 1 = 666.

10305021231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-10305021231 is a prime.

It is a super-2 number, since 2×10305021231² (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 (10305021931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224466 + ... + 266448.

It is an arithmetic number, because the mean of its divisors is an integer number (954296320).

Almost surely, 2^10305021231 is an apocalyptic number.

10305021231 is a deficient number, since it is larger than the sum of its proper divisors (4963719889).

10305021231 is an equidigital number, since it uses as much as digits as its factorization.

10305021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51083 (or 51077 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 10305021231 its reverse (13212050301), we get a palindrome (23517071532).

The spelling of 10305021231 in words is "ten billion, three hundred five million, twenty-one thousand, two hundred thirty-one".