11440312131 has 8 divisors (see below), whose sum is σ = 15254330704. Its totient is φ = 7626584160.

The previous prime is 11440312127. The next prime is 11440312151. The reversal of 11440312131 is 13121304411.

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

It is not a de Polignac number, because 11440312131 - 2² = 11440312127 is a prime.

It is a super-2 number, since 2×11440312131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11440312098 and 11440312107.

It is not an unprimeable number, because it can be changed into a prime (11440312111) 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, 47685 + ... + 158601.

It is an arithmetic number, because the mean of its divisors is an integer number (1906791338).

Almost surely, 2^11440312131 is an apocalyptic number.

11440312131 is a deficient number, since it is larger than the sum of its proper divisors (3814018573).

11440312131 is a wasteful number, since it uses less digits than its factorization.

11440312131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145301.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11440312131 its reverse (13121304411), we get a palindrome (24561616542).

The spelling of 11440312131 in words is "eleven billion, four hundred forty million, three hundred twelve thousand, one hundred thirty-one".