231185607840 has 384 divisors, whose sum is σ = 901498429440. Its totient is φ = 54852019200.

The previous prime is 231185607691. The next prime is 231185607899. The reversal of 231185607840 is 48706581132.

231185607840 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 8 + 560 + 7 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2181685 + ... + 2285195.

It is an arithmetic number, because the mean of its divisors is an integer number (2347652160).

Almost surely, 2^231185607840 is an apocalyptic number.

231185607840 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 231185607840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450749214720).

231185607840 is an abundant number, since it is smaller than the sum of its proper divisors (670312821600).

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

231185607840 is a wasteful number, since it uses less digits than its factorization.

231185607840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103593 (or 103579 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 231185607840 in words is "two hundred thirty-one billion, one hundred eighty-five million, six hundred seven thousand, eight hundred forty".