31322130311 has 4 divisors (see below), whose sum is σ = 32402203800. Its totient is φ = 30242056824.

The previous prime is 31322130299. The next prime is 31322130317. The reversal of 31322130311 is 11303122313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31322130311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322130317) 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, 540036701 + ... + 540036758.

It is an arithmetic number, because the mean of its divisors is an integer number (8100550950).

Almost surely, 2^31322130311 is an apocalyptic number.

31322130311 is a deficient number, since it is larger than the sum of its proper divisors (1080073489).

31322130311 is a wasteful number, since it uses less digits than its factorization.

31322130311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080073488.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31322130311 its reverse (11303122313), we get a palindrome (42625252624).

The spelling of 31322130311 in words is "thirty-one billion, three hundred twenty-two million, one hundred thirty thousand, three hundred eleven".