1513719681 has 16 divisors (see below), whose sum is σ = 2029473600. Its totient is φ = 1003572288.

The previous prime is 1513719679. The next prime is 1513719703. The reversal of 1513719681 is 1869173151.

It is not a de Polignac number, because 1513719681 - 2¹ = 1513719679 is a prime.

It is a super-2 number, since 2×1513719681² = 4582694545293483522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1513719481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467175 + ... + 470403.

It is an arithmetic number, because the mean of its divisors is an integer number (126842100).

Almost surely, 2^1513719681 is an apocalyptic number.

It is an amenable number.

1513719681 is a deficient number, since it is larger than the sum of its proper divisors (515753919).

1513719681 is a wasteful number, since it uses less digits than its factorization.

1513719681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048.

The product of its digits is 45360, while the sum is 42.

The square root of 1513719681 is about 38906.5506181157. The cubic root of 1513719681 is about 1148.1936812292.

The spelling of 1513719681 in words is "one billion, five hundred thirteen million, seven hundred nineteen thousand, six hundred eighty-one".