31242033240 has 64 divisors (see below), whose sum is σ = 102246658560. Its totient is φ = 7573825920.

The previous prime is 31242033223. The next prime is 31242033283. The reversal of 31242033240 is 4233024213.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31242033240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11832784 + ... + 11835423.

It is an arithmetic number, because the mean of its divisors is an integer number (1597604040).

Almost surely, 2^31242033240 is an apocalyptic number.

31242033240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31242033240 is an abundant number, since it is smaller than the sum of its proper divisors (71004625320).

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

31242033240 is a wasteful number, since it uses less digits than its factorization.

31242033240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23668232 (or 23668228 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31242033240 its reverse (4233024213), we get a palindrome (35475057453).

The spelling of 31242033240 in words is "thirty-one billion, two hundred forty-two million, thirty-three thousand, two hundred forty".