31343425 has 6 divisors (see below), whose sum is σ = 38865878. Its totient is φ = 25074720.

The previous prime is 31343423. The next prime is 31343441. The reversal of 31343425 is 52434313.

It can be written as a sum of positive squares in 3 ways, for example, as 8904256 + 22439169 = 2984^2 + 4737^2 .

It is not a de Polignac number, because 31343425 - 2¹ = 31343423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1253737 = 31343425 / (3 + 1 + 3 + 4 + 3 + 4 + 2 + 5).

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 31343425.

It is not an unprimeable number, because it can be changed into a prime (31343423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 626844 + ... + 626893.

Almost surely, 2^31343425 is an apocalyptic number.

It is an amenable number.

31343425 is a deficient number, since it is larger than the sum of its proper divisors (7522453).

31343425 is a wasteful number, since it uses less digits than its factorization.

31343425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253747 (or 1253742 counting only the distinct ones).

The product of its digits is 4320, while the sum is 25.

The square root of 31343425 is about 5598.5198936862. The cubic root of 31343425 is about 315.2938385229.

Adding to 31343425 its reverse (52434313), we get a palindrome (83777738).

The spelling of 31343425 in words is "thirty-one million, three hundred forty-three thousand, four hundred twenty-five".