212537394 has 24 divisors (see below), whose sum is σ = 463816080. Its totient is φ = 70335288.

The previous prime is 212537389. The next prime is 212537459. The reversal of 212537394 is 493735212.

212537394 is a `hidden beast` number, since 212 + 53 + 7 + 394 = 666.

It is a super-2 number, since 2×212537394² = 90344287696622472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39972 + ... + 44975.

It is an arithmetic number, because the mean of its divisors is an integer number (19325670).

Almost surely, 2^212537394 is an apocalyptic number.

212537394 is an abundant number, since it is smaller than the sum of its proper divisors (251278686).

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

212537394 is a wasteful number, since it uses less digits than its factorization.

212537394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85094 (or 85091 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 212537394 is about 14578.6622843113. The cubic root of 212537394 is about 596.7765971346.

The spelling of 212537394 in words is "two hundred twelve million, five hundred thirty-seven thousand, three hundred ninety-four".