31300080 has 160 divisors (see below), whose sum is σ = 114659328. Its totient is φ = 6912000.

The previous prime is 31300069. The next prime is 31300081. The reversal of 31300080 is 8000313.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51780 + ... + 52380.

Almost surely, 2^31300080 is an apocalyptic number.

31300080 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 31300080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57329664).

31300080 is an abundant number, since it is smaller than the sum of its proper divisors (83359248).

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

31300080 is a wasteful number, since it uses less digits than its factorization.

31300080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31300080 is about 5594.6474419752. The cubic root of 31300080 is about 315.1484309288.

Adding to 31300080 its reverse (8000313), we get a palindrome (39300393).

The spelling of 31300080 in words is "thirty-one million, three hundred thousand, eighty".