231546315640 has 32 divisors (see below), whose sum is σ = 529519858560. Its totient is φ = 91100188800.

The previous prime is 231546315593. The next prime is 231546315641. The reversal of 231546315640 is 46513645132.

It is a super-2 number, since 2×231546315640² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 231546315593 and 231546315602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231546315641) 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, 47445576 + ... + 47450455.

It is an arithmetic number, because the mean of its divisors is an integer number (16547495580).

Almost surely, 2^231546315640 is an apocalyptic number.

231546315640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231546315640 is an abundant number, since it is smaller than the sum of its proper divisors (297973542920).

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

231546315640 is a wasteful number, since it uses less digits than its factorization.

231546315640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94896103 (or 94896099 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 231546315640 in words is "two hundred thirty-one billion, five hundred forty-six million, three hundred fifteen thousand, six hundred forty".