31231430022 has 16 divisors (see below), whose sum is σ = 67267695600. Its totient is φ = 9609670752.

The previous prime is 31231429991. The next prime is 31231430023. The reversal of 31231430022 is 22003413213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231430023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200201397 + ... + 200201552.

It is an arithmetic number, because the mean of its divisors is an integer number (4204230975).

Almost surely, 2^31231430022 is an apocalyptic number.

31231430022 is an abundant number, since it is smaller than the sum of its proper divisors (36036265578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231430022 is a wasteful number, since it uses less digits than its factorization.

31231430022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400402967.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31231430022 its reverse (22003413213), we get a palindrome (53234843235).

The spelling of 31231430022 in words is "thirty-one billion, two hundred thirty-one million, four hundred thirty thousand, twenty-two".