31131330234 has 32 divisors (see below), whose sum is σ = 64769544000. Its totient is φ = 9963295104.

The previous prime is 31131330233. The next prime is 31131330259. The reversal of 31131330234 is 43203313113.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31131330233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468619 + ... + 530910.

It is an arithmetic number, because the mean of its divisors is an integer number (2024048250).

Almost surely, 2^31131330234 is an apocalyptic number.

31131330234 is an abundant number, since it is smaller than the sum of its proper divisors (33638213766).

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

31131330234 is a wasteful number, since it uses less digits than its factorization.

31131330234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999742.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31131330234 its reverse (43203313113), we get a palindrome (74334643347).

The spelling of 31131330234 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty thousand, two hundred thirty-four".