31252413 has 4 divisors (see below), whose sum is σ = 41669888. Its totient is φ = 20834940.

The previous prime is 31252399. The next prime is 31252421. The reversal of 31252413 is 31425213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31425213 = 3 ⋅10475071.

It is not a de Polignac number, because 31252413 - 2⁵ = 31252381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31252413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31252493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5208733 + ... + 5208738.

It is an arithmetic number, because the mean of its divisors is an integer number (10417472).

Almost surely, 2^31252413 is an apocalyptic number.

It is an amenable number.

31252413 is a deficient number, since it is larger than the sum of its proper divisors (10417475).

31252413 is a wasteful number, since it uses less digits than its factorization.

31252413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10417474.

The product of its digits is 720, while the sum is 21.

The square root of 31252413 is about 5590.3857648645. The cubic root of 31252413 is about 314.9883694370.

Adding to 31252413 its reverse (31425213), we get a palindrome (62677626).

It can be divided in two parts, 312 and 52413, that added together give a palindrome (52725).

The spelling of 31252413 in words is "thirty-one million, two hundred fifty-two thousand, four hundred thirteen".