55687525 has 6 divisors (see below), whose sum is σ = 69052562. Its totient is φ = 44550000.

The previous prime is 55687523. The next prime is 55687543. The reversal of 55687525 is 52578655.

It can be written as a sum of positive squares in 3 ways, for example, as 1532644 + 54154881 = 1238^2 + 7359^2 .

It is not a de Polignac number, because 55687525 - 2¹ = 55687523 is a prime.

It is a super-2 number, since 2×55687525² = 6202200881251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55687523) 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, 1113726 + ... + 1113775.

Almost surely, 2^55687525 is an apocalyptic number.

It is an amenable number.

55687525 is a deficient number, since it is larger than the sum of its proper divisors (13365037).

55687525 is a wasteful number, since it uses less digits than its factorization.

55687525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227511 (or 2227506 counting only the distinct ones).

The product of its digits is 420000, while the sum is 43.

The square root of 55687525 is about 7462.4074533625. The cubic root of 55687525 is about 381.8733098697.

The spelling of 55687525 in words is "fifty-five million, six hundred eighty-seven thousand, five hundred twenty-five".