212981572 has 12 divisors (see below), whose sum is σ = 374319036. Its totient is φ = 106033280.

The previous prime is 212981567. The next prime is 212981591. The reversal of 212981572 is 275189212.

212981572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104530176 + 108451396 = 10224^2 + 10414^2 .

It is a super-2 number, since 2×212981572² = 90722300023182368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113329 + ... + 115192.

It is an arithmetic number, because the mean of its divisors is an integer number (31193253).

Almost surely, 2^212981572 is an apocalyptic number.

It is an amenable number.

212981572 is a deficient number, since it is larger than the sum of its proper divisors (161337464).

212981572 is a wasteful number, since it uses less digits than its factorization.

212981572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228758 (or 228756 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 212981572 is about 14593.8881727934. Note that the first 3 decimals coincide. The cubic root of 212981572 is about 597.1920386811.

The spelling of 212981572 in words is "two hundred twelve million, nine hundred eighty-one thousand, five hundred seventy-two".