55000072 has 16 divisors (see below), whose sum is σ = 103819500. Its totient is φ = 27314880.

The previous prime is 55000069. The next prime is 55000091. The reversal of 55000072 is 27000055.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43480836 + 11519236 = 6594^2 + 3394^2 .

It is an unprimeable number.

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, 21879 + ... + 24262.

Almost surely, 2^55000072 is an apocalyptic number.

It is an amenable number.

55000072 is a deficient number, since it is larger than the sum of its proper divisors (48819428).

55000072 is a wasteful number, since it uses less digits than its factorization.

55000072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46296 (or 46292 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 19.

The square root of 55000072 is about 7416.2033413331. The cubic root of 55000072 is about 380.2954120231.

The spelling of 55000072 in words is "fifty-five million, seventy-two", and thus it is an aban number and an uban number.