31742253 has 16 divisors (see below), whose sum is σ = 47400960. Its totient is φ = 20992608.

The previous prime is 31742251. The next prime is 31742257. The reversal of 31742253 is 35224713.

It is not a de Polignac number, because 31742253 - 2¹ = 31742251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31742251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200 + ... + 8057.

It is an arithmetic number, because the mean of its divisors is an integer number (2962560).

Almost surely, 2^31742253 is an apocalyptic number.

It is an amenable number.

31742253 is a deficient number, since it is larger than the sum of its proper divisors (15658707).

31742253 is a wasteful number, since it uses less digits than its factorization.

31742253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9393 (or 9387 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 31742253 is about 5634.0263577658. The cubic root of 31742253 is about 316.6255201694.

Adding to 31742253 its reverse (35224713), we get a palindrome (66966966).

The spelling of 31742253 in words is "thirty-one million, seven hundred forty-two thousand, two hundred fifty-three".