55407725 has 6 divisors (see below), whose sum is σ = 68705610. Its totient is φ = 44326160.

The previous prime is 55407659. The next prime is 55407731. The reversal of 55407725 is 52770455.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8649481 + 46758244 = 2941^2 + 6838^2 .

It is not a de Polignac number, because 55407725 - 2¹⁴ = 55391341 is a prime.

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, 1108130 + ... + 1108179.

It is an arithmetic number, because the mean of its divisors is an integer number (11450935).

Almost surely, 2^55407725 is an apocalyptic number.

It is an amenable number.

55407725 is a deficient number, since it is larger than the sum of its proper divisors (13297885).

55407725 is a wasteful number, since it uses less digits than its factorization.

55407725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216319 (or 2216314 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 55407725 is about 7443.6365440556. The cubic root of 55407725 is about 381.2326660577.

The spelling of 55407725 in words is "fifty-five million, four hundred seven thousand, seven hundred twenty-five".