15506216051 has 4 divisors (see below), whose sum is σ = 15513460704. Its totient is φ = 15498971400.

The previous prime is 15506216041. The next prime is 15506216053. The reversal of 15506216051 is 15061260551.

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-15506216051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15506215999 and 15506216017.

It is not an unprimeable number, because it can be changed into a prime (15506216053) 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, 3619115 + ... + 3623396.

It is an arithmetic number, because the mean of its divisors is an integer number (3878365176).

Almost surely, 2^15506216051 is an apocalyptic number.

15506216051 is a deficient number, since it is larger than the sum of its proper divisors (7244653).

15506216051 is an equidigital number, since it uses as much as digits as its factorization.

15506216051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7244652.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 15506216051 in words is "fifteen billion, five hundred six million, two hundred sixteen thousand, fifty-one".