31012224240 has 80 divisors (see below), whose sum is σ = 96557882400. Its totient is φ = 8233798656.

The previous prime is 31012224239. The next prime is 31012224263. The reversal of 31012224240 is 4242221013.

It is a tau number, because it is divible by the number of its divisors (80).

It is a zygodrome in base 2.

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, 227175 + ... + 337094.

It is an arithmetic number, because the mean of its divisors is an integer number (1206973530).

Almost surely, 2^31012224240 is an apocalyptic number.

31012224240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31012224240 is an abundant number, since it is smaller than the sum of its proper divisors (65545658160).

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

31012224240 is a wasteful number, since it uses less digits than its factorization.

31012224240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564514 (or 564508 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 31012224240 its reverse (4242221013), we get a palindrome (35254445253).

The spelling of 31012224240 in words is "thirty-one billion, twelve million, two hundred twenty-four thousand, two hundred forty".