1516051651 has 4 divisors (see below), whose sum is σ = 1516848552. Its totient is φ = 1515254752.

The previous prime is 1516051639. The next prime is 1516051657. The reversal of 1516051651 is 1561506151.

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

It is a cyclic number.

It is not a de Polignac number, because 1516051651 - 2¹¹ = 1516049603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516051657) 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, 395590 + ... + 399403.

It is an arithmetic number, because the mean of its divisors is an integer number (379212138).

Almost surely, 2^1516051651 is an apocalyptic number.

1516051651 is a deficient number, since it is larger than the sum of its proper divisors (796901).

1516051651 is an equidigital number, since it uses as much as digits as its factorization.

1516051651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796900.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1516051651 is about 38936.5079456286. The cubic root of 1516051651 is about 1148.7829976119.

The spelling of 1516051651 in words is "one billion, five hundred sixteen million, fifty-one thousand, six hundred fifty-one".