231220657100 has 18 divisors (see below), whose sum is σ = 501748826124. Its totient is φ = 92488262800.

The previous prime is 231220657093. The next prime is 231220657121. The reversal of 231220657100 is 1756022132.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1156103186 + ... + 1156103385.

Almost surely, 2^231220657100 is an apocalyptic number.

231220657100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231220657100 is an abundant number, since it is smaller than the sum of its proper divisors (270528169024).

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

231220657100 is a wasteful number, since it uses less digits than its factorization.

231220657100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312206585 (or 2312206578 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 231220657100 its reverse (1756022132), we get a palindrome (232976679232).

The spelling of 231220657100 in words is "two hundred thirty-one billion, two hundred twenty million, six hundred fifty-seven thousand, one hundred".