212151655 has 16 divisors (see below), whose sum is σ = 271309824. Its totient is φ = 158884000.

The previous prime is 212151649. The next prime is 212151661. The reversal of 212151655 is 556151212.

It is an interprime number because it is at equal distance from previous prime (212151649) and next prime (212151661).

It is not a de Polignac number, because 212151655 - 2³ = 212151647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14221 + ... + 25030.

It is an arithmetic number, because the mean of its divisors is an integer number (16956864).

Almost surely, 2^212151655 is an apocalyptic number.

212151655 is a deficient number, since it is larger than the sum of its proper divisors (59158169).

212151655 is a wasteful number, since it uses less digits than its factorization.

212151655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39326.

The product of its digits is 3000, while the sum is 28.

The square root of 212151655 is about 14565.4267016109. The cubic root of 212151655 is about 596.4153439779.

The spelling of 212151655 in words is "two hundred twelve million, one hundred fifty-one thousand, six hundred fifty-five".