31542253140 has 48 divisors (see below), whose sum is σ = 89815239360. Its totient is φ = 8268702720.

The previous prime is 31542253123. The next prime is 31542253219. The reversal of 31542253140 is 4135224513.

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 = 31542253098 and 31542253107.

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, 4451581 + ... + 4458660.

It is an arithmetic number, because the mean of its divisors is an integer number (1871150820).

Almost surely, 2^31542253140 is an apocalyptic number.

31542253140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31542253140 is an abundant number, since it is smaller than the sum of its proper divisors (58272986220).

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

31542253140 is a wasteful number, since it uses less digits than its factorization.

31542253140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910312 (or 8910310 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 31542253140 its reverse (4135224513), we get a palindrome (35677477653).

The spelling of 31542253140 in words is "thirty-one billion, five hundred forty-two million, two hundred fifty-three thousand, one hundred forty".