55707815 has 8 divisors (see below), whose sum is σ = 66903408. Its totient is φ = 44530240.

The previous prime is 55707809. The next prime is 55707893. The reversal of 55707815 is 51870755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55707815 - 2¹² = 55703719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3644 + ... + 11166.

It is an arithmetic number, because the mean of its divisors is an integer number (8362926).

Almost surely, 2^55707815 is an apocalyptic number.

55707815 is a deficient number, since it is larger than the sum of its proper divisors (11195593).

55707815 is a wasteful number, since it uses less digits than its factorization.

55707815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009.

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 55707815 is about 7463.7668103981. The cubic root of 55707815 is about 381.9196833236.

The spelling of 55707815 in words is "fifty-five million, seven hundred seven thousand, eight hundred fifteen".