31132231001 has 4 divisors (see below), whose sum is σ = 31135728912. Its totient is φ = 31128733092.

The previous prime is 31132230973. The next prime is 31132231021. The reversal of 31132231001 is 10013223113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31132231001 - 2⁶ = 31132230937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31132231021) 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, 1735571 + ... + 1753416.

It is an arithmetic number, because the mean of its divisors is an integer number (7783932228).

Almost surely, 2^31132231001 is an apocalyptic number.

It is an amenable number.

31132231001 is a deficient number, since it is larger than the sum of its proper divisors (3497911).

31132231001 is an equidigital number, since it uses as much as digits as its factorization.

31132231001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497910.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31132231001 its reverse (10013223113), we get a palindrome (41145454114).

The spelling of 31132231001 in words is "thirty-one billion, one hundred thirty-two million, two hundred thirty-one thousand, one".