55004425 has 24 divisors (see below), whose sum is σ = 78316416. Its totient is φ = 37539840.

The previous prime is 55004419. The next prime is 55004437. The reversal of 55004425 is 52440055.

It is a de Polignac number, because none of the positive numbers 2^k-55004425 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55004425.

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, 44364 + ... + 45586.

It is an arithmetic number, because the mean of its divisors is an integer number (3263184).

Almost surely, 2^55004425 is an apocalyptic number.

It is an amenable number.

55004425 is a deficient number, since it is larger than the sum of its proper divisors (23311991).

55004425 is a wasteful number, since it uses less digits than its factorization.

55004425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1492 counting only the distinct ones).

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

The square root of 55004425 is about 7416.4968145345. The cubic root of 55004425 is about 380.3054446297.

The spelling of 55004425 in words is "fifty-five million, four thousand, four hundred twenty-five".