55945138 has 16 divisors (see below), whose sum is σ = 85165920. Its totient is φ = 27559296.

The previous prime is 55945129. The next prime is 55945159. The reversal of 55945138 is 83154955.

It is a self number, because there is not a number n which added to its sum of digits gives 55945138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54393 + ... + 55411.

It is an arithmetic number, because the mean of its divisors is an integer number (5322870).

Almost surely, 2^55945138 is an apocalyptic number.

55945138 is a deficient number, since it is larger than the sum of its proper divisors (29220782).

55945138 is a wasteful number, since it uses less digits than its factorization.

55945138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401.

The product of its digits is 108000, while the sum is 40.

The square root of 55945138 is about 7479.6482537617. The cubic root of 55945138 is about 382.4612585536.

The spelling of 55945138 in words is "fifty-five million, nine hundred forty-five thousand, one hundred thirty-eight".