11157813 has 12 divisors (see below), whose sum is σ = 16284268. Its totient is φ = 7361280.

The previous prime is 11157803. The next prime is 11157823. The reversal of 11157813 is 31875111.

It is an interprime number because it is at equal distance from previous prime (11157803) and next prime (11157823).

It can be written as a sum of positive squares in 2 ways, for example, as 6671889 + 4485924 = 2583^2 + 2118^2 .

It is not a de Polignac number, because 11157813 - 2⁸ = 11157557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11157803) 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, 5518 + ... + 7263.

Almost surely, 2^11157813 is an apocalyptic number.

It is an amenable number.

11157813 is a deficient number, since it is larger than the sum of its proper divisors (5126455).

11157813 is a wasteful number, since it uses less digits than its factorization.

11157813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12884 (or 12881 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 11157813 is about 3340.3312709969. The cubic root of 11157813 is about 223.4565175232.

The spelling of 11157813 in words is "eleven million, one hundred fifty-seven thousand, eight hundred thirteen".