31253322540 has 48 divisors (see below), whose sum is σ = 95464696320. Its totient is φ = 7576562880.

The previous prime is 31253322491. The next prime is 31253322557. The reversal of 31253322540 is 4522335213.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 31253322498 and 31253322507.

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, 23676100 + ... + 23677419.

It is an arithmetic number, because the mean of its divisors is an integer number (1988847840).

Almost surely, 2^31253322540 is an apocalyptic number.

31253322540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31253322540 is an abundant number, since it is smaller than the sum of its proper divisors (64211373780).

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

31253322540 is a wasteful number, since it uses less digits than its factorization.

31253322540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47353542 (or 47353540 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 31253322540 its reverse (4522335213), we get a palindrome (35775657753).

The spelling of 31253322540 in words is "thirty-one billion, two hundred fifty-three million, three hundred twenty-two thousand, five hundred forty".