11312138 has 8 divisors (see below), whose sum is σ = 17062500. Its totient is φ = 5624640.

The previous prime is 11312111. The next prime is 11312177. The reversal of 11312138 is 83121311.

It can be written as a sum of positive squares in 2 ways, for example, as 10543009 + 769129 = 3247^2 + 877^2 .

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

It is a super-2 number, since 2×11312138² = 255928932262088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15263 + ... + 15986.

Almost surely, 2^11312138 is an apocalyptic number.

11312138 is a deficient number, since it is larger than the sum of its proper divisors (5750362).

11312138 is a wasteful number, since it uses less digits than its factorization.

11312138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31432.

The product of its digits is 144, while the sum is 20.

The square root of 11312138 is about 3363.3521968417. The cubic root of 11312138 is about 224.4820216323.

Adding to 11312138 its reverse (83121311), we get a palindrome (94433449).

The spelling of 11312138 in words is "eleven million, three hundred twelve thousand, one hundred thirty-eight".