216953877 has 16 divisors (see below), whose sum is σ = 338286080. Its totient is φ = 121090032.

The previous prime is 216953861. The next prime is 216953897. The reversal of 216953877 is 778359612.

It is not a de Polignac number, because 216953877 - 2⁴ = 216953861 is a prime.

It is a super-2 number, since 2×216953877² = 94137969490662258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216953827) 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, 119227 + ... + 121032.

It is an arithmetic number, because the mean of its divisors is an integer number (21142880).

Almost surely, 2^216953877 is an apocalyptic number.

It is an amenable number.

216953877 is a deficient number, since it is larger than the sum of its proper divisors (121332203).

216953877 is a wasteful number, since it uses less digits than its factorization.

216953877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240312.

The product of its digits is 635040, while the sum is 48.

The square root of 216953877 is about 14729.3542628318. The cubic root of 216953877 is about 600.8819224972.

The spelling of 216953877 in words is "two hundred sixteen million, nine hundred fifty-three thousand, eight hundred seventy-seven".