55302505 has 4 divisors (see below), whose sum is σ = 66363012. Its totient is φ = 44242000.

The previous prime is 55302493. The next prime is 55302517. The reversal of 55302505 is 50520355.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55302493) and next prime (55302517).

It can be written as a sum of positive squares in 2 ways, for example, as 7027801 + 48274704 = 2651^2 + 6948^2 .

It is not a de Polignac number, because 55302505 - 2⁵ = 55302473 is a prime.

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 55302505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5530246 + ... + 5530255.

It is an arithmetic number, because the mean of its divisors is an integer number (16590753).

Almost surely, 2^55302505 is an apocalyptic number.

It is an amenable number.

55302505 is a deficient number, since it is larger than the sum of its proper divisors (11060507).

55302505 is a wasteful number, since it uses less digits than its factorization.

55302505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060506.

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 55302505 is about 7436.5654034642. The cubic root of 55302505 is about 380.9911911861.

The spelling of 55302505 in words is "fifty-five million, three hundred two thousand, five hundred five".