231865621217280 has 1088 divisors, whose sum is σ = 846685609136640. Its totient is φ = 60167710310400.

The previous prime is 231865621217213. The next prime is 231865621217327. The reversal of 231865621217280 is 82712126568132.

It is a happy number.

231865621217280 is a `hidden beast` number, since 2 + 3 + 1 + 8 + 6 + 5 + 621 + 2 + 1 + 7 + 2 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228890050054 + ... + 228890051066.

Almost surely, 2^{231865621217280} is an apocalyptic number.

231865621217280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231865621217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423342804568320).

231865621217280 is an abundant number, since it is smaller than the sum of its proper divisors (614819987919360).

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

231865621217280 is an equidigital number, since it uses as much as digits as its factorization.

231865621217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 231865621217280 in words is "two hundred thirty-one trillion, eight hundred sixty-five billion, six hundred twenty-one million, two hundred seventeen thousand, two hundred eighty".