55503279 has 16 divisors (see below), whose sum is σ = 88552800. Its totient is φ = 34155648.

The previous prime is 55503277. The next prime is 55503311. The reversal of 55503279 is 97230555.

55503279 is a `hidden beast` number, since 5 + 550 + 32 + 79 = 666.

It is not a de Polignac number, because 55503279 - 2¹ = 55503277 is a prime.

It is a super-2 number, since 2×55503279² = 6161227959503682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55503277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78714 + ... + 79415.

It is an arithmetic number, because the mean of its divisors is an integer number (5534550).

Almost surely, 2^55503279 is an apocalyptic number.

55503279 is a deficient number, since it is larger than the sum of its proper divisors (33049521).

55503279 is a wasteful number, since it uses less digits than its factorization.

55503279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158151 (or 158145 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 55503279 is about 7450.0522816957. The cubic root of 55503279 is about 381.4516931896.

The spelling of 55503279 in words is "fifty-five million, five hundred three thousand, two hundred seventy-nine".