31331134320 has 40 divisors (see below), whose sum is σ = 97126517136. Its totient is φ = 8354969088.

The previous prime is 31331134301. The next prime is 31331134381. The reversal of 31331134320 is 2343113313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65272957 + ... + 65273436.

Almost surely, 2^31331134320 is an apocalyptic number.

31331134320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31331134320 is an abundant number, since it is smaller than the sum of its proper divisors (65795382816).

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

31331134320 is a wasteful number, since it uses less digits than its factorization.

31331134320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130546409 (or 130546403 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31331134320 its reverse (2343113313), we get a palindrome (33674247633).

The spelling of 31331134320 in words is "thirty-one billion, three hundred thirty-one million, one hundred thirty-four thousand, three hundred twenty".