31318253340 has 144 divisors (see below), whose sum is σ = 97149566976. Its totient is φ = 7532300160.

The previous prime is 31318253333. The next prime is 31318253387. The reversal of 31318253340 is 4335281313.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 905037 + ... + 939003.

Almost surely, 2^31318253340 is an apocalyptic number.

31318253340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31318253340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48574783488).

31318253340 is an abundant number, since it is smaller than the sum of its proper divisors (65831313636).

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

31318253340 is a wasteful number, since it uses less digits than its factorization.

31318253340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34128 (or 34115 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 31318253340 in words is "thirty-one billion, three hundred eighteen million, two hundred fifty-three thousand, three hundred forty".