231544402452 has 72 divisors (see below), whose sum is σ = 643094917920. Its totient is φ = 69660169920.

The previous prime is 231544402447. The next prime is 231544402471. The reversal of 231544402452 is 254204445132.

231544402452 is a `hidden beast` number, since 2 + 3 + 1 + 544 + 40 + 24 + 52 = 666.

231544402452 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231544402452² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 2048223 + ... + 2158310.

It is an arithmetic number, because the mean of its divisors is an integer number (8931873860).

Almost surely, 2^231544402452 is an apocalyptic number.

231544402452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231544402452 is an abundant number, since it is smaller than the sum of its proper divisors (411550515468).

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

231544402452 is a wasteful number, since it uses less digits than its factorization.

231544402452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206693 (or 4206688 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 231544402452 its reverse (254204445132), we get a palindrome (485748847584).

The spelling of 231544402452 in words is "two hundred thirty-one billion, five hundred forty-four million, four hundred two thousand, four hundred fifty-two".