11125413531 has 16 divisors (see below), whose sum is σ = 16627957920. Its totient is φ = 7351303680.

The previous prime is 11125413527. The next prime is 11125413553. The reversal of 11125413531 is 13531452111.

11125413531 is a `hidden beast` number, since 1 + 1 + 125 + 4 + 1 + 3 + 531 = 666.

It is not a de Polignac number, because 11125413531 - 2² = 11125413527 is a prime.

It is a super-2 number, since 2×11125413531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 11125413495 and 11125413504.

It is not an unprimeable number, because it can be changed into a prime (11125413731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1820190 + ... + 1826291.

It is an arithmetic number, because the mean of its divisors is an integer number (1039247370).

Almost surely, 2^11125413531 is an apocalyptic number.

11125413531 is a deficient number, since it is larger than the sum of its proper divisors (5502544389).

11125413531 is a wasteful number, since it uses less digits than its factorization.

11125413531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646603 (or 3646597 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

Adding to 11125413531 its reverse (13531452111), we get a palindrome (24656865642).

The spelling of 11125413531 in words is "eleven billion, one hundred twenty-five million, four hundred thirteen thousand, five hundred thirty-one".