31441011131 has 4 divisors (see below), whose sum is σ = 33290482392. Its totient is φ = 29591539872.

The previous prime is 31441011073. The next prime is 31441011149. The reversal of 31441011131 is 13111014413.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-31441011131 is a prime.

It is a super-2 number, since 2×31441011131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31441011191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924735605 + ... + 924735638.

It is an arithmetic number, because the mean of its divisors is an integer number (8322620598).

Almost surely, 2^31441011131 is an apocalyptic number.

31441011131 is a deficient number, since it is larger than the sum of its proper divisors (1849471261).

31441011131 is a wasteful number, since it uses less digits than its factorization.

31441011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849471260.

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

Adding to 31441011131 its reverse (13111014413), we get a palindrome (44552025544).

The spelling of 31441011131 in words is "thirty-one billion, four hundred forty-one million, eleven thousand, one hundred thirty-one".