231264304240 has 20 divisors (see below), whose sum is σ = 537689507544. Its totient is φ = 92505721664.

The previous prime is 231264304223. The next prime is 231264304241. The reversal of 231264304240 is 42403462132.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×231264304240² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231264304241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445401822 + ... + 1445401981.

Almost surely, 2^231264304240 is an apocalyptic number.

231264304240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231264304240 is an abundant number, since it is smaller than the sum of its proper divisors (306425203304).

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

231264304240 is a wasteful number, since it uses less digits than its factorization.

231264304240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890803816 (or 2890803810 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 231264304240 its reverse (42403462132), we get a palindrome (273667766372).

The spelling of 231264304240 in words is "two hundred thirty-one billion, two hundred sixty-four million, three hundred four thousand, two hundred forty".