31013010 has 128 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 6946560.

The previous prime is 31012973. The next prime is 31013023. The reversal of 31013010 is 1031013.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 31012983 and 31013001.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115156 + ... + 115424.

It is an arithmetic number, because the mean of its divisors is an integer number (753300).

Almost surely, 2^31013010 is an apocalyptic number.

31013010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48211200).

31013010 is an abundant number, since it is smaller than the sum of its proper divisors (65409390).

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

31013010 is a wasteful number, since it uses less digits than its factorization.

31013010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 31013010 is about 5568.9325727647. The cubic root of 31013010 is about 314.1820046438.

Adding to 31013010 its reverse (1031013), we get a palindrome (32044023).

The spelling of 31013010 in words is "thirty-one million, thirteen thousand, ten".