212113155 has 32 divisors (see below), whose sum is σ = 347203584. Its totient is φ = 110537856.

The previous prime is 212113147. The next prime is 212113157. The reversal of 212113155 is 551311212.

It is not a de Polignac number, because 212113155 - 2³ = 212113147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212113157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291402 + ... + 292128.

It is an arithmetic number, because the mean of its divisors is an integer number (10850112).

Almost surely, 2^212113155 is an apocalyptic number.

212113155 is a deficient number, since it is larger than the sum of its proper divisors (135090429).

212113155 is a wasteful number, since it uses less digits than its factorization.

212113155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its digits is 300, while the sum is 21.

The square root of 212113155 is about 14564.1050188468. The cubic root of 212113155 is about 596.3792638447.

Adding to 212113155 its reverse (551311212), we get a palindrome (763424367).

The spelling of 212113155 in words is "two hundred twelve million, one hundred thirteen thousand, one hundred fifty-five".