55515711 has 8 divisors (see below), whose sum is σ = 74121264. Its totient is φ = 36960320.

The previous prime is 55515703. The next prime is 55515737. The reversal of 55515711 is 11751555.

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

It is a cyclic number.

It is not a de Polignac number, because 55515711 - 2³ = 55515703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9876 + ... + 14441.

It is an arithmetic number, because the mean of its divisors is an integer number (9265158).

Almost surely, 2^55515711 is an apocalyptic number.

55515711 is a deficient number, since it is larger than the sum of its proper divisors (18605553).

55515711 is a wasteful number, since it uses less digits than its factorization.

55515711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25081.

The product of its digits is 4375, while the sum is 30.

The square root of 55515711 is about 7450.8865915406. The cubic root of 55515711 is about 381.4801711073.

The spelling of 55515711 in words is "fifty-five million, five hundred fifteen thousand, seven hundred eleven".