215657112000 has 224 divisors, whose sum is σ = 776837078784. Its totient is φ = 52280448000.

The previous prime is 215657111983. The next prime is 215657112029. The reversal of 215657112000 is 211756512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144442 + ... + 672441.

Almost surely, 2^215657112000 is an apocalyptic number.

215657112000 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 215657112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388418539392).

215657112000 is an abundant number, since it is smaller than the sum of its proper divisors (561179966784).

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

215657112000 is a wasteful number, since it uses less digits than its factorization.

215657112000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816924 (or 816904 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 215657112000 its reverse (211756512), we get a palindrome (215868868512).

The spelling of 215657112000 in words is "two hundred fifteen billion, six hundred fifty-seven million, one hundred twelve thousand".