55440025 has 24 divisors (see below), whose sum is σ = 72673920. Its totient is φ = 41885760.

The previous prime is 55440013. The next prime is 55440031. The reversal of 55440025 is 52004455.

It is not a de Polignac number, because 55440025 - 2⁷ = 55439897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33262 + ... + 34888.

It is an arithmetic number, because the mean of its divisors is an integer number (3028080).

Almost surely, 2^55440025 is an apocalyptic number.

It is an amenable number.

55440025 is a deficient number, since it is larger than the sum of its proper divisors (17233895).

55440025 is a wasteful number, since it uses less digits than its factorization.

55440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713 (or 1708 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55440025 is about 7445.8058663922. The cubic root of 55440025 is about 381.3067316813.

The spelling of 55440025 in words is "fifty-five million, four hundred forty thousand, twenty-five".