216996357 has 16 divisors (see below), whose sum is σ = 299808000. Its totient is φ = 139441344.

The previous prime is 216996341. The next prime is 216996389. The reversal of 216996357 is 753699612.

216996357 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 216996357 - 2⁴ = 216996341 is a prime.

It is a super-3 number, since 3×216996357³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216996557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60819 + ... + 64287.

It is an arithmetic number, because the mean of its divisors is an integer number (18738000).

Almost surely, 2^216996357 is an apocalyptic number.

It is an amenable number.

216996357 is a deficient number, since it is larger than the sum of its proper divisors (82811643).

216996357 is a wasteful number, since it uses less digits than its factorization.

216996357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220.

The product of its digits is 612360, while the sum is 48.

The square root of 216996357 is about 14730.7962106602. The cubic root of 216996357 is about 600.9211378957.

The spelling of 216996357 in words is "two hundred sixteen million, nine hundred ninety-six thousand, three hundred fifty-seven".