55540025 has 24 divisors (see below), whose sum is σ = 70870464. Its totient is φ = 43160000.

The previous prime is 55540019. The next prime is 55540027. The reversal of 55540025 is 52004555.

It is not a de Polignac number, because 55540025 - 2⁸ = 55539769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55539976 and 55540003.

It is not an unprimeable number, because it can be changed into a prime (55540027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221150 + ... + 221400.

It is an arithmetic number, because the mean of its divisors is an integer number (2952936).

Almost surely, 2^55540025 is an apocalyptic number.

It is an amenable number.

55540025 is a deficient number, since it is larger than the sum of its proper divisors (15330439).

55540025 is a wasteful number, since it uses less digits than its factorization.

55540025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55540025 is about 7452.5180308403. The cubic root of 55540025 is about 381.5358547744.

The spelling of 55540025 in words is "fifty-five million, five hundred forty thousand, twenty-five".