31244313140 has 24 divisors (see below), whose sum is σ = 67009082112. Its totient is φ = 12231815840.

The previous prime is 31244313091. The next prime is 31244313239. The reversal of 31244313140 is 4131344213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16618376 + ... + 16620255.

It is an arithmetic number, because the mean of its divisors is an integer number (2792045088).

Almost surely, 2^31244313140 is an apocalyptic number.

It is an amenable number.

31244313140 is an abundant number, since it is smaller than the sum of its proper divisors (35764768972).

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

31244313140 is a wasteful number, since it uses less digits than its factorization.

31244313140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33238687 (or 33238685 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31244313140 its reverse (4131344213), we get a palindrome (35375657353).

The spelling of 31244313140 in words is "thirty-one billion, two hundred forty-four million, three hundred thirteen thousand, one hundred forty".