31231333133 has 32 divisors (see below), whose sum is σ = 41948239872. Its totient is φ = 22455921600.

The previous prime is 31231333039. The next prime is 31231333141. The reversal of 31231333133 is 33133313213.

It is a happy number.

It is not a de Polignac number, because 31231333133 - 2¹⁴ = 31231316749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231333433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4664318 + ... + 4671008.

It is an arithmetic number, because the mean of its divisors is an integer number (1310882496).

Almost surely, 2^31231333133 is an apocalyptic number.

It is an amenable number.

31231333133 is a deficient number, since it is larger than the sum of its proper divisors (10716906739).

31231333133 is a wasteful number, since it uses less digits than its factorization.

31231333133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385.

The product of its digits is 4374, while the sum is 26.

Adding to 31231333133 its reverse (33133313213), we get a palindrome (64364646346).

The spelling of 31231333133 in words is "thirty-one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred thirty-three".