111513131 has 8 divisors (see below), whose sum is σ = 116674560. Its totient is φ = 106377832.

The previous prime is 111513119. The next prime is 111513133. The reversal of 111513131 is 131315111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111513131 - 2²⁶ = 44404267 is a prime.

It is a super-2 number, since 2×111513131² = 24870356770846322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111513133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2480 + ... + 15138.

It is an arithmetic number, because the mean of its divisors is an integer number (14584320).

Almost surely, 2^111513131 is an apocalyptic number.

111513131 is a deficient number, since it is larger than the sum of its proper divisors (5161429).

111513131 is a wasteful number, since it uses less digits than its factorization.

111513131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13065.

The product of its digits is 45, while the sum is 17.

The square root of 111513131 is about 10559.9777935373. The cubic root of 111513131 is about 481.3289718943.

Adding to 111513131 its reverse (131315111), we get a palindrome (242828242).

The spelling of 111513131 in words is "one hundred eleven million, five hundred thirteen thousand, one hundred thirty-one".