55307212 has 12 divisors (see below), whose sum is σ = 96916120. Its totient is φ = 27616896.

The previous prime is 55307201. The next prime is 55307243. The reversal of 55307212 is 21270355.

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, 5637 + ... + 11932.

Almost surely, 2^55307212 is an apocalyptic number.

It is an amenable number.

55307212 is a deficient number, since it is larger than the sum of its proper divisors (41608908).

55307212 is a wasteful number, since it uses less digits than its factorization.

55307212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18360 (or 18358 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 55307212 is about 7436.8818734736. The cubic root of 55307212 is about 381.0020000676.

Adding to 55307212 its reverse (21270355), we get a palindrome (76577567).

The spelling of 55307212 in words is "fifty-five million, three hundred seven thousand, two hundred twelve".