11145513131 has 6 divisors (see below), whose sum is σ = 11543094732. Its totient is φ = 10761184280.

The previous prime is 11145513101. The next prime is 11145513139. The reversal of 11145513131 is 13131554111.

It is a de Polignac number, because none of the positive numbers 2^k-11145513131 is a prime.

It is a super-2 number, since 2×11145513131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11145513131.

It is not an unprimeable number, because it can be changed into a prime (11145513139) 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, 6625505 + ... + 6627186.

It is an arithmetic number, because the mean of its divisors is an integer number (1923849122).

Almost surely, 2^11145513131 is an apocalyptic number.

11145513131 is a deficient number, since it is larger than the sum of its proper divisors (397581601).

11145513131 is an equidigital number, since it uses as much as digits as its factorization.

11145513131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13252749 (or 13252720 counting only the distinct ones).

The product of its digits is 900, while the sum is 26.

The spelling of 11145513131 in words is "eleven billion, one hundred forty-five million, five hundred thirteen thousand, one hundred thirty-one".