1516253921 has 16 divisors (see below), whose sum is σ = 1897795200. Its totient is φ = 1179335808.

The previous prime is 1516253911. The next prime is 1516253933. The reversal of 1516253921 is 1293526151.

It is not a de Polignac number, because 1516253921 - 2¹⁸ = 1515991777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1516253911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135836 + ... + 146573.

It is an arithmetic number, because the mean of its divisors is an integer number (118612200).

Almost surely, 2^1516253921 is an apocalyptic number.

It is an amenable number.

1516253921 is a deficient number, since it is larger than the sum of its proper divisors (381541279).

1516253921 is a wasteful number, since it uses less digits than its factorization.

1516253921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282488.

The product of its digits is 16200, while the sum is 35.

The square root of 1516253921 is about 38939.1052927517. The cubic root of 1516253921 is about 1148.8340851422.

The spelling of 1516253921 in words is "one billion, five hundred sixteen million, two hundred fifty-three thousand, nine hundred twenty-one".