55156725 has 72 divisors (see below), whose sum is σ = 107987880. Its totient is φ = 26749440.

The previous prime is 55156723. The next prime is 55156733. The reversal of 55156725 is 52765155.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 7918596 + 47238129 = 2814^2 + 6873^2 .

It is not a de Polignac number, because 55156725 - 2¹ = 55156723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55156725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55156723) 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 71 ways as a sum of consecutive naturals, for example, 318739 + ... + 318911.

Almost surely, 2^55156725 is an apocalyptic number.

It is an amenable number.

55156725 is a deficient number, since it is larger than the sum of its proper divisors (52831155).

55156725 is a wasteful number, since it uses less digits than its factorization.

55156725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 303 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 55156725 is about 7426.7573677884. The cubic root of 55156725 is about 380.6561263746.

The spelling of 55156725 in words is "fifty-five million, one hundred fifty-six thousand, seven hundred twenty-five".