1131577513 has 4 divisors (see below), whose sum is σ = 1234448208. Its totient is φ = 1028706820.

The previous prime is 1131577487. The next prime is 1131577523. The reversal of 1131577513 is 3157751311.

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 1131577513 - 2²⁹ = 594706601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131577523) 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, 51435331 + ... + 51435352.

It is an arithmetic number, because the mean of its divisors is an integer number (308612052).

Almost surely, 2^1131577513 is an apocalyptic number.

It is an amenable number.

1131577513 is a deficient number, since it is larger than the sum of its proper divisors (102870695).

1131577513 is a wasteful number, since it uses less digits than its factorization.

1131577513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102870694.

The product of its digits is 11025, while the sum is 34.

The square root of 1131577513 is about 33638.9285352551. The cubic root of 1131577513 is about 1042.0649041693.

The spelling of 1131577513 in words is "one billion, one hundred thirty-one million, five hundred seventy-seven thousand, five hundred thirteen".