55478525 has 6 divisors (see below), whose sum is σ = 68793402. Its totient is φ = 44382800.

The previous prime is 55478519. The next prime is 55478551. The reversal of 55478525 is 52587455.

It can be written as a sum of positive squares in 3 ways, for example, as 1705636 + 53772889 = 1306^2 + 7333^2 .

It is not a de Polignac number, because 55478525 - 2⁴ = 55478509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1109546 + ... + 1109595.

It is an arithmetic number, because the mean of its divisors is an integer number (11465567).

Almost surely, 2^55478525 is an apocalyptic number.

It is an amenable number.

55478525 is a deficient number, since it is larger than the sum of its proper divisors (13314877).

55478525 is a wasteful number, since it uses less digits than its factorization.

55478525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219151 (or 2219146 counting only the distinct ones).

The product of its digits is 280000, while the sum is 41.

The square root of 55478525 is about 7448.3907657963. The cubic root of 55478525 is about 381.3949766647.

The spelling of 55478525 in words is "fifty-five million, four hundred seventy-eight thousand, five hundred twenty-five".