31742225 has 12 divisors (see below), whose sum is σ = 39901836. Its totient is φ = 25044480.

The previous prime is 31742219. The next prime is 31742237. The reversal of 31742225 is 52224713.

It can be written as a sum of positive squares in 6 ways, for example, as 2050624 + 29691601 = 1432^2 + 5449^2 .

It is not a de Polignac number, because 31742225 - 2⁴ = 31742209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31742194 and 31742203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6872 + ... + 10521.

It is an arithmetic number, because the mean of its divisors is an integer number (3325153).

Almost surely, 2^31742225 is an apocalyptic number.

It is an amenable number.

31742225 is a deficient number, since it is larger than the sum of its proper divisors (8159611).

31742225 is a wasteful number, since it uses less digits than its factorization.

31742225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17476 (or 17471 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 31742225 is about 5634.0238728639. The cubic root of 31742225 is about 316.6254270703.

Adding to 31742225 its reverse (52224713), we get a palindrome (83966938).

The spelling of 31742225 in words is "thirty-one million, seven hundred forty-two thousand, two hundred twenty-five".