1513198681 has 12 divisors (see below), whose sum is σ = 1618661968. Its totient is φ = 1413725544.

The previous prime is 1513198669. The next prime is 1513198693. The reversal of 1513198681 is 1868913151.

It is an interprime number because it is at equal distance from previous prime (1513198669) and next prime (1513198693).

It is not a de Polignac number, because 1513198681 - 2¹³ = 1513190489 is a prime.

It is a super-2 number, since 2×1513198681² = 4579540496360279522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1513198651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10515 + ... + 56008.

Almost surely, 2^1513198681 is an apocalyptic number.

It is an amenable number.

1513198681 is a deficient number, since it is larger than the sum of its proper divisors (105463287).

1513198681 is an equidigital number, since it uses as much as digits as its factorization.

1513198681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66612 (or 66589 counting only the distinct ones).

The product of its digits is 51840, while the sum is 43.

The square root of 1513198681 is about 38899.8545112961. The cubic root of 1513198681 is about 1148.0619356667.

It can be divided in two parts, 151319 and 8681, that added together give a 4-th power (160000 = 20⁴).

The spelling of 1513198681 in words is "one billion, five hundred thirteen million, one hundred ninety-eight thousand, six hundred eighty-one".