31225338 has 20 divisors (see below), whose sum is σ = 69968250. Its totient is φ = 10408392.

The previous prime is 31225331. The next prime is 31225349. The reversal of 31225338 is 83352213.

31225338 is a `hidden beast` number, since 3 + 122 + 533 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26040609 + 5184729 = 5103^2 + 2277^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31225331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 96213 + ... + 96536.

Almost surely, 2^31225338 is an apocalyptic number.

31225338 is an abundant number, since it is smaller than the sum of its proper divisors (38742912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31225338 is a wasteful number, since it uses less digits than its factorization.

31225338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192763 (or 192754 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 31225338 is about 5587.9636720365. The cubic root of 31225338 is about 314.8973815393.

The spelling of 31225338 in words is "thirty-one million, two hundred twenty-five thousand, three hundred thirty-eight".