53516556 has 18 divisors (see below), whose sum is σ = 135278052. Its totient is φ = 17838840.

The previous prime is 53516531. The next prime is 53516557. The reversal of 53516556 is 65561535.

53516556 is a `hidden beast` number, since 53 + 51 + 6 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×53516556² = 5728043532202272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1486571 = 53516556 / (5 + 3 + 5 + 1 + 6 + 5 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 53516556.

It is not an unprimeable number, because it can be changed into a prime (53516557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743250 + ... + 743321.

Almost surely, 2^53516556 is an apocalyptic number.

It is an amenable number.

53516556 is an abundant number, since it is smaller than the sum of its proper divisors (81761496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53516556 is a wasteful number, since it uses less digits than its factorization.

53516556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486581 (or 1486576 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

The square root of 53516556 is about 7315.5010764814. The cubic root of 53516556 is about 376.8449667081.

The spelling of 53516556 in words is "fifty-three million, five hundred sixteen thousand, five hundred fifty-six".