212240456 has 16 divisors (see below), whose sum is σ = 403891440. Its totient is φ = 104536080.

The previous prime is 212240449. The next prime is 212240471. The reversal of 212240456 is 654042212.

It is a super-2 number, since 2×212240456² = 90092022326175872, 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, 197450 + ... + 198521.

It is an arithmetic number, because the mean of its divisors is an integer number (25243215).

Almost surely, 2^212240456 is an apocalyptic number.

It is an amenable number.

212240456 is a deficient number, since it is larger than the sum of its proper divisors (191650984).

212240456 is a wasteful number, since it uses less digits than its factorization.

212240456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396044 (or 396040 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 212240456 is about 14568.4747314192. The cubic root of 212240456 is about 596.4985468659.

Adding to 212240456 its reverse (654042212), we get a palindrome (866282668).

The spelling of 212240456 in words is "two hundred twelve million, two hundred forty thousand, four hundred fifty-six".