1157113513 has 4 divisors (see below), whose sum is σ = 1160216068. Its totient is φ = 1154010960.

The previous prime is 1157113501. The next prime is 1157113537. The reversal of 1157113513 is 3153117511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3153117511 = 61 ⋅51690451.

It can be written as a sum of positive squares in 2 ways, for example, as 962985024 + 194128489 = 31032^2 + 13933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157113513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157114513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550718 + ... + 1551463.

It is an arithmetic number, because the mean of its divisors is an integer number (290054017).

Almost surely, 2^1157113513 is an apocalyptic number.

It is an amenable number.

1157113513 is a deficient number, since it is larger than the sum of its proper divisors (3102555).

1157113513 is an equidigital number, since it uses as much as digits as its factorization.

1157113513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102554.

The product of its digits is 1575, while the sum is 28.

The square root of 1157113513 is about 34016.3712497380. The cubic root of 1157113513 is about 1049.8453326226.

The spelling of 1157113513 in words is "one billion, one hundred fifty-seven million, one hundred thirteen thousand, five hundred thirteen".