55515701 has 4 divisors (see below), whose sum is σ = 58437600. Its totient is φ = 52593804.

The previous prime is 55515689. The next prime is 55515703. The reversal of 55515701 is 10751555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55515701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1460921 + ... + 1460958.

It is an arithmetic number, because the mean of its divisors is an integer number (14609400).

Almost surely, 2^55515701 is an apocalyptic number.

It is an amenable number.

55515701 is a deficient number, since it is larger than the sum of its proper divisors (2921899).

55515701 is a wasteful number, since it uses less digits than its factorization.

55515701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921898.

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 55515701 is about 7450.8859204795. The cubic root of 55515701 is about 381.4801482020.

The spelling of 55515701 in words is "fifty-five million, five hundred fifteen thousand, seven hundred one".