15056551 has 4 divisors (see below), whose sum is σ = 15066072. Its totient is φ = 15047032.

The previous prime is 15056537. The next prime is 15056557. The reversal of 15056551 is 15565051.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15056551 - 2¹⁵ = 15023783 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 (15056557) 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, 1756 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (3766518).

Almost surely, 2^15056551 is an apocalyptic number.

15056551 is a deficient number, since it is larger than the sum of its proper divisors (9521).

15056551 is an equidigital number, since it uses as much as digits as its factorization.

15056551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 15056551 is about 3880.2771808210. The cubic root of 15056551 is about 246.9307448972.

The spelling of 15056551 in words is "fifteen million, fifty-six thousand, five hundred fifty-one".