231521025513342 has 32 divisors (see below), whose sum is σ = 490282014184704. Its totient is φ = 72633721968000.

The previous prime is 231521025513307. The next prime is 231521025513361. The reversal of 231521025513342 is 243315520125132.

It is a self number, because there is not a number n which added to its sum of digits gives 231521025513342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18334167 + ... + 28269837.

It is an arithmetic number, because the mean of its divisors is an integer number (15321312943272).

Almost surely, 2^{231521025513342} is an apocalyptic number.

231521025513342 is an abundant number, since it is smaller than the sum of its proper divisors (258760988671362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231521025513342 is a wasteful number, since it uses less digits than its factorization.

231521025513342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164144.

The product of its (nonzero) digits is 216000, while the sum is 39.

Adding to 231521025513342 its reverse (243315520125132), we get a palindrome (474836545638474).

The spelling of 231521025513342 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, twenty-five million, five hundred thirteen thousand, three hundred forty-two".