215120455400420 has 48 divisors (see below), whose sum is σ = 469289227188096. Its totient is φ = 82767059424000.

The previous prime is 215120455400353. The next prime is 215120455400503. The reversal of 215120455400420 is 24004554021512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1847420786 + ... + 1847537225.

It is an arithmetic number, because the mean of its divisors is an integer number (9776858899752).

Almost surely, 2^{215120455400420} is an apocalyptic number.

215120455400420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215120455400420 is an abundant number, since it is smaller than the sum of its proper divisors (254168771787676).

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

215120455400420 is a wasteful number, since it uses less digits than its factorization.

215120455400420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694958132 (or 3694958130 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

The spelling of 215120455400420 in words is "two hundred fifteen trillion, one hundred twenty billion, four hundred fifty-five million, four hundred thousand, four hundred twenty".