231240005120400 has 120 divisors (see below), whose sum is σ = 740763977892480. Its totient is φ = 61661906757120.

The previous prime is 231240005120269. The next prime is 231240005120413. The reversal of 231240005120400 is 4021500042132.

It is a tau number, because it is divible by the number of its divisors (120).

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

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 23 ways as a sum of consecutive naturals, for example, 32229561 + ... + 38745639.

It is an arithmetic number, because the mean of its divisors is an integer number (6173033149104).

Almost surely, 2^{231240005120400} is an apocalyptic number.

231240005120400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231240005120400 is an abundant number, since it is smaller than the sum of its proper divisors (509523972772080).

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

231240005120400 is a wasteful number, since it uses less digits than its factorization.

231240005120400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6545673 (or 6545662 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 231240005120400 its reverse (4021500042132), we get a palindrome (235261505162532).

The spelling of 231240005120400 in words is "two hundred thirty-one trillion, two hundred forty billion, five million, one hundred twenty thousand, four hundred".