56215212 has 12 divisors (see below), whose sum is σ = 131168856. Its totient is φ = 18738400.

The previous prime is 56215189. The next prime is 56215213. The reversal of 56215212 is 21251265.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (56215213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342289 + ... + 2342312.

It is an arithmetic number, because the mean of its divisors is an integer number (10930738).

Almost surely, 2^56215212 is an apocalyptic number.

It is an amenable number.

56215212 is an abundant number, since it is smaller than the sum of its proper divisors (74953644).

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

56215212 is a wasteful number, since it uses less digits than its factorization.

56215212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684608 (or 4684606 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 56215212 is about 7497.6804413098. The cubic root of 56215212 is about 383.0757121373.

Adding to 56215212 its reverse (21251265), we get a palindrome (77466477).

The spelling of 56215212 in words is "fifty-six million, two hundred fifteen thousand, two hundred twelve".