56661212 has 6 divisors (see below), whose sum is σ = 99157128. Its totient is φ = 28330604.

The previous prime is 56661203. The next prime is 56661217. The reversal of 56661212 is 21216665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7082648 + ... + 7082655.

It is an arithmetic number, because the mean of its divisors is an integer number (16526188).

Almost surely, 2^56661212 is an apocalyptic number.

It is an amenable number.

56661212 is a deficient number, since it is larger than the sum of its proper divisors (42495916).

56661212 is a wasteful number, since it uses less digits than its factorization.

56661212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14165307 (or 14165305 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 56661212 is about 7527.3642133220. The cubic root of 56661212 is about 384.0861261532.

Adding to 56661212 its reverse (21216665), we get a palindrome (77877877).

The spelling of 56661212 in words is "fifty-six million, six hundred sixty-one thousand, two hundred twelve".