55705015 has 4 divisors (see below), whose sum is σ = 66846024. Its totient is φ = 44564008.

The previous prime is 55704973. The next prime is 55705037. The reversal of 55705015 is 51050755.

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

It is a cyclic number.

It is not a de Polignac number, because 55705015 - 2⁹ = 55704503 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 3 ways as a sum of consecutive naturals, for example, 5570497 + ... + 5570506.

It is an arithmetic number, because the mean of its divisors is an integer number (16711506).

Almost surely, 2^55705015 is an apocalyptic number.

55705015 is a deficient number, since it is larger than the sum of its proper divisors (11141009).

55705015 is a wasteful number, since it uses less digits than its factorization.

55705015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141008.

The product of its (nonzero) digits is 4375, while the sum is 28.

The square root of 55705015 is about 7463.5792351927. The cubic root of 55705015 is about 381.9132845025.

It can be divided in two parts, 5570 and 5015, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 55705015 in words is "fifty-five million, seven hundred five thousand, fifteen".