231431303400 has 144 divisors (see below), whose sum is σ = 788588068800. Its totient is φ = 56104540800.

The previous prime is 231431303387. The next prime is 231431303407. The reversal of 231431303400 is 4303134132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (231431303407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1521280 + ... + 1666479.

Almost surely, 2^231431303400 is an apocalyptic number.

231431303400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231431303400 is an abundant number, since it is smaller than the sum of its proper divisors (557156765400).

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

231431303400 is a wasteful number, since it uses less digits than its factorization.

231431303400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187800 (or 3187780 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231431303400 its reverse (4303134132), we get a palindrome (235734437532).

The spelling of 231431303400 in words is "two hundred thirty-one billion, four hundred thirty-one million, three hundred three thousand, four hundred".