31430113 has 36 divisors (see below), whose sum is σ = 39429180. Its totient is φ = 24984960.

The previous prime is 31430081. The next prime is 31430117. The reversal of 31430113 is 31103413.

It can be written as a sum of positive squares in 6 ways, for example, as 2140369 + 29289744 = 1463^2 + 5412^2 .

It is not a de Polignac number, because 31430113 - 2⁵ = 31430081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31430117) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 592995 + ... + 593047.

It is an arithmetic number, because the mean of its divisors is an integer number (1095255).

Almost surely, 2^31430113 is an apocalyptic number.

It is an amenable number.

31430113 is a deficient number, since it is larger than the sum of its proper divisors (7999067).

31430113 is a wasteful number, since it uses less digits than its factorization.

31430113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 31430113 is about 5606.2565941990. The cubic root of 31430113 is about 315.5842453407.

Adding to 31430113 its reverse (31103413), we get a palindrome (62533526).

The spelling of 31430113 in words is "thirty-one million, four hundred thirty thousand, one hundred thirteen".