31113030 has 32 divisors (see below), whose sum is σ = 80416224. Its totient is φ = 7658496.

The previous prime is 31113029. The next prime is 31113059. The reversal of 31113030 is 3031113.

It is a junction number, because it is equal to n+sod(n) for n = 31112997 and 31113015.

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, 39499 + ... + 40278.

It is an arithmetic number, because the mean of its divisors is an integer number (2513007).

Almost surely, 2^31113030 is an apocalyptic number.

31113030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31113030 is an abundant number, since it is smaller than the sum of its proper divisors (49303194).

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

31113030 is a wasteful number, since it uses less digits than its factorization.

31113030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79800.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31113030 is about 5577.9055208922. The cubic root of 31113030 is about 314.5193981243.

Adding to 31113030 its reverse (3031113), we get a palindrome (34144143).

The spelling of 31113030 in words is "thirty-one million, one hundred thirteen thousand, thirty".