31413213 has 36 divisors (see below), whose sum is σ = 51767040. Its totient is φ = 18296928.

The previous prime is 31413211. The next prime is 31413227. The reversal of 31413213 is 31231413.

It is not a de Polignac number, because 31413213 - 2¹ = 31413211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31413211) 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, 28356 + ... + 29442.

Almost surely, 2^31413213 is an apocalyptic number.

It is an amenable number.

31413213 is a deficient number, since it is larger than the sum of its proper divisors (20353827).

31413213 is a wasteful number, since it uses less digits than its factorization.

31413213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1122 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31413213 is about 5604.7491469289. The cubic root of 31413213 is about 315.5276718889.

Adding to 31413213 its reverse (31231413), we get a palindrome (62644626).

It can be divided in two parts, 31413 and 213, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 31413213 in words is "thirty-one million, four hundred thirteen thousand, two hundred thirteen".