102305511231 has 32 divisors (see below), whose sum is σ = 171364571136. Its totient is φ = 52740012000.

The previous prime is 102305511227. The next prime is 102305511257. The reversal of 102305511231 is 132115503201.

It is not a de Polignac number, because 102305511231 - 2² = 102305511227 is a prime.

It is a super-2 number, since 2×102305511231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102305511281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1660125 + ... + 1720646.

It is an arithmetic number, because the mean of its divisors is an integer number (5355142848).

Almost surely, 2^102305511231 is an apocalyptic number.

102305511231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102305511231 is a deficient number, since it is larger than the sum of its proper divisors (69059059905).

102305511231 is a wasteful number, since it uses less digits than its factorization.

102305511231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380923.

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 102305511231 in words is "one hundred two billion, three hundred five million, five hundred eleven thousand, two hundred thirty-one".