55520356 has 18 divisors (see below), whose sum is σ = 102546150. Its totient is φ = 26298432.

The previous prime is 55520329. The next prime is 55520383. The reversal of 55520356 is 65302555.

55520356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55520329) and next prime (55520383).

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 25160256 = 5510^2 + 5016^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17781 + ... + 20668.

Almost surely, 2^55520356 is an apocalyptic number.

It is an amenable number.

55520356 is a deficient number, since it is larger than the sum of its proper divisors (47025794).

55520356 is a wasteful number, since it uses less digits than its factorization.

55520356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38491 (or 38470 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 55520356 is about 7451.1982928922. The cubic root of 55520356 is about 381.4908102936.

The spelling of 55520356 in words is "fifty-five million, five hundred twenty thousand, three hundred fifty-six".