231543445400 has 96 divisors (see below), whose sum is σ = 556164403200. Its totient is φ = 89555510400.

The previous prime is 231543445391. The next prime is 231543445447. The reversal of 231543445400 is 4544345132.

It is a super-2 number, since 2×231543445400² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7790969 + ... + 7820631.

It is an arithmetic number, because the mean of its divisors is an integer number (5793379200).

Almost surely, 2^231543445400 is an apocalyptic number.

231543445400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231543445400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278082201600).

231543445400 is an abundant number, since it is smaller than the sum of its proper divisors (324620957800).

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

231543445400 is a wasteful number, since it uses less digits than its factorization.

231543445400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30969 (or 30960 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 231543445400 in words is "two hundred thirty-one billion, five hundred forty-three million, four hundred forty-five thousand, four hundred".