231242020400 has 30 divisors (see below), whose sum is σ = 555558954972. Its totient is φ = 92496808000.

The previous prime is 231242020333. The next prime is 231242020423. The reversal of 231242020400 is 4020242132.

231242020400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 289052126 + ... + 289052925.

Almost surely, 2^231242020400 is an apocalyptic number.

231242020400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231242020400 is an abundant number, since it is smaller than the sum of its proper divisors (324316934572).

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

231242020400 is a wasteful number, since it uses less digits than its factorization.

231242020400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578105069 (or 578105058 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 231242020400 its reverse (4020242132), we get a palindrome (235262262532).

The spelling of 231242020400 in words is "two hundred thirty-one billion, two hundred forty-two million, twenty thousand, four hundred".