231431700 has 36 divisors (see below), whose sum is σ = 669609920. Its totient is φ = 61715040.

The previous prime is 231431623. The next prime is 231431701. The reversal of 231431700 is 7134132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231431701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385420 + ... + 386019.

Almost surely, 2^231431700 is an apocalyptic number.

231431700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231431700 is an abundant number, since it is smaller than the sum of its proper divisors (438178220).

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

231431700 is a wasteful number, since it uses less digits than its factorization.

231431700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771456 (or 771449 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 231431700 is about 15212.8794118668. The cubic root of 231431700 is about 613.9612314468.

Adding to 231431700 its reverse (7134132), we get a palindrome (238565832).

The spelling of 231431700 in words is "two hundred thirty-one million, four hundred thirty-one thousand, seven hundred".