216161379 has 24 divisors (see below), whose sum is σ = 370056960. Its totient is φ = 123519816.

The previous prime is 216161377. The next prime is 216161411. The reversal of 216161379 is 973161612.

216161379 is a `hidden beast` number, since 2 + 1 + 616 + 1 + 37 + 9 = 666.

216161379 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 216161379 - 2¹ = 216161377 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (216161371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61839 + ... + 65240.

It is an arithmetic number, because the mean of its divisors is an integer number (15419040).

Almost surely, 2^216161379 is an apocalyptic number.

216161379 is a deficient number, since it is larger than the sum of its proper divisors (153895581).

216161379 is an equidigital number, since it uses as much as digits as its factorization.

216161379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127101 (or 127089 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 216161379 is about 14702.4276566831. The cubic root of 216161379 is about 600.1493878024.

The spelling of 216161379 in words is "two hundred sixteen million, one hundred sixty-one thousand, three hundred seventy-nine".