31430013 has 4 divisors (see below), whose sum is σ = 41906688. Its totient is φ = 20953340.

The previous prime is 31430011. The next prime is 31430017. The reversal of 31430013 is 31003413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31430013 - 2¹ = 31430011 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31429974 and 31430001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5238333 + ... + 5238338.

It is an arithmetic number, because the mean of its divisors is an integer number (10476672).

Almost surely, 2^31430013 is an apocalyptic number.

It is an amenable number.

31430013 is a deficient number, since it is larger than the sum of its proper divisors (10476675).

31430013 is a wasteful number, since it uses less digits than its factorization.

31430013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476674.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31430013 is about 5606.2476755848. The cubic root of 31430013 is about 315.5839106462.

Adding to 31430013 its reverse (31003413), we get a palindrome (62433426).

The spelling of 31430013 in words is "thirty-one million, four hundred thirty thousand, thirteen".