212661512 has 16 divisors (see below), whose sum is σ = 455703360. Its totient is φ = 91140624.

The previous prime is 212661503. The next prime is 212661523. The reversal of 212661512 is 215166212.

It is a super-2 number, since 2×212661512² = 90449837372252288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1898708 + ... + 1898819.

It is an arithmetic number, because the mean of its divisors is an integer number (28481460).

Almost surely, 2^212661512 is an apocalyptic number.

It is an amenable number.

212661512 is an abundant number, since it is smaller than the sum of its proper divisors (243041848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212661512 is a wasteful number, since it uses less digits than its factorization.

212661512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3797540 (or 3797536 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 212661512 is about 14582.9185007666. The cubic root of 212661512 is about 596.8927434470.

The spelling of 212661512 in words is "two hundred twelve million, six hundred sixty-one thousand, five hundred twelve".