212528392 has 32 divisors (see below), whose sum is σ = 406413720. Its totient is φ = 104163840.

The previous prime is 212528383. The next prime is 212528399. The reversal of 212528392 is 293825212.

It can be written as a sum of positive squares in 4 ways, for example, as 120253156 + 92275236 = 10966^2 + 9606^2 .

It is a super-2 number, since 2×212528392² = 90336634812211328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212528399) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 193188 + ... + 194284.

Almost surely, 2^212528392 is an apocalyptic number.

It is an amenable number.

212528392 is a deficient number, since it is larger than the sum of its proper divisors (193885328).

212528392 is a wasteful number, since it uses less digits than its factorization.

212528392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1557 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 212528392 is about 14578.3535421528. The cubic root of 212528392 is about 596.7681715447.

The spelling of 212528392 in words is "two hundred twelve million, five hundred twenty-eight thousand, three hundred ninety-two".