1513137281 has 4 divisors (see below), whose sum is σ = 1519803312. Its totient is φ = 1506471252.

The previous prime is 1513137251. The next prime is 1513137319. The reversal of 1513137281 is 1827313151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1513137281 - 2⁶ = 1513137217 is a prime.

It is a super-2 number, since 2×1513137281² = 4579168862304145922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1513137221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332675 + ... + 3333128.

It is an arithmetic number, because the mean of its divisors is an integer number (379950828).

Almost surely, 2^1513137281 is an apocalyptic number.

It is an amenable number.

1513137281 is a deficient number, since it is larger than the sum of its proper divisors (6666031).

1513137281 is an equidigital number, since it uses as much as digits as its factorization.

1513137281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6666030.

The product of its digits is 5040, while the sum is 32.

The square root of 1513137281 is about 38899.0652972536. The cubic root of 1513137281 is about 1148.0464074224.

The spelling of 1513137281 in words is "one billion, five hundred thirteen million, one hundred thirty-seven thousand, two hundred eighty-one".