11516531 has 24 divisors (see below), whose sum is σ = 13894272. Its totient is φ = 9446400.

The previous prime is 11516521. The next prime is 11516539. The reversal of 11516531 is 13561511.

It is not a de Polignac number, because 11516531 - 2¹⁰ = 11515507 is a prime.

It is a super-2 number, since 2×11516531² = 265260972547922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11516497 and 11516506.

It is not an unprimeable number, because it can be changed into a prime (11516539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280871 + ... + 280911.

It is an arithmetic number, because the mean of its divisors is an integer number (578928).

Almost surely, 2^11516531 is an apocalyptic number.

11516531 is a deficient number, since it is larger than the sum of its proper divisors (2377741).

11516531 is a wasteful number, since it uses less digits than its factorization.

11516531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 102 counting only the distinct ones).

The product of its digits is 450, while the sum is 23.

The square root of 11516531 is about 3393.6014792547. The cubic root of 11516531 is about 225.8259748362.

The spelling of 11516531 in words is "eleven million, five hundred sixteen thousand, five hundred thirty-one".