216057051 has 40 divisors (see below), whose sum is σ = 373384704. Its totient is φ = 121947120.

The previous prime is 216057031. The next prime is 216057067. The reversal of 216057051 is 150750612.

216057051 is a `hidden beast` number, since 2 + 1 + 605 + 7 + 0 + 51 = 666.

216057051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216057051 - 2⁵ = 216057019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (216057031) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 44766 + ... + 49356.

Almost surely, 2^216057051 is an apocalyptic number.

216057051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

216057051 is a deficient number, since it is larger than the sum of its proper divisors (157327653).

216057051 is an equidigital number, since it uses as much as digits as its factorization.

216057051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4684 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 216057051 is about 14698.8792429899. The cubic root of 216057051 is about 600.0528203499.

The spelling of 216057051 in words is "two hundred sixteen million, fifty-seven thousand, fifty-one".