55619812 has 12 divisors (see below), whose sum is σ = 99598576. Its totient is φ = 27163080.

The previous prime is 55619807. The next prime is 55619813. The reversal of 55619812 is 21891655.

It is not an unprimeable number, because it can be changed into a prime (55619813) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 161514 + ... + 161857.

Almost surely, 2^55619812 is an apocalyptic number.

It is an amenable number.

55619812 is a deficient number, since it is larger than the sum of its proper divisors (43978764).

55619812 is a wasteful number, since it uses less digits than its factorization.

55619812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323418 (or 323416 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 55619812 is about 7457.8691326679. The cubic root of 55619812 is about 381.7184680383.

The spelling of 55619812 in words is "fifty-five million, six hundred nineteen thousand, eight hundred twelve".