15565157051 has 4 divisors (see below), whose sum is σ = 15565854504. Its totient is φ = 15564459600.

The previous prime is 15565156961. The next prime is 15565157063. The reversal of 15565157051 is 15075156551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15565157051 is a prime.

It is a super-2 number, since 2×15565157051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15565157081) 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, 314105 + ... + 360266.

It is an arithmetic number, because the mean of its divisors is an integer number (3891463626).

Almost surely, 2^15565157051 is an apocalyptic number.

15565157051 is a deficient number, since it is larger than the sum of its proper divisors (697453).

15565157051 is an equidigital number, since it uses as much as digits as its factorization.

15565157051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697452.

The product of its (nonzero) digits is 131250, while the sum is 41.

The spelling of 15565157051 in words is "fifteen billion, five hundred sixty-five million, one hundred fifty-seven thousand, fifty-one".