1513122381 has 6 divisors (see below), whose sum is σ = 2185621230. Its totient is φ = 1008748248.

The previous prime is 1513122379. The next prime is 1513122407. The reversal of 1513122381 is 1832213151.

It can be written as a sum of positive squares in only one way, i.e., 1399508100 + 113614281 = 37410^2 + 10659^2 .

It is not a de Polignac number, because 1513122381 - 2¹ = 1513122379 is a prime.

It is a super-2 number, since 2×1513122381² = 4579078679766218322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513122311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84062346 + ... + 84062363.

It is an arithmetic number, because the mean of its divisors is an integer number (364270205).

Almost surely, 2^1513122381 is an apocalyptic number.

It is an amenable number.

1513122381 is a deficient number, since it is larger than the sum of its proper divisors (672498849).

1513122381 is a wasteful number, since it uses less digits than its factorization.

1513122381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168124715 (or 168124712 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 1513122381 is about 38898.8737754707. The cubic root of 1513122381 is about 1148.0426391043.

The spelling of 1513122381 in words is "one billion, five hundred thirteen million, one hundred twenty-two thousand, three hundred eighty-one".