31425133 has 2 divisors, whose sum is σ = 31425134. Its totient is φ = 31425132.

The previous prime is 31425127. The next prime is 31425179. The reversal of 31425133 is 33152413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27688644 + 3736489 = 5262^2 + 1933^2 .

It is a cyclic number.

It is not a de Polignac number, because 31425133 - 2⁵ = 31425101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31425193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712566 + 15712567.

It is an arithmetic number, because the mean of its divisors is an integer number (15712567).

Almost surely, 2^31425133 is an apocalyptic number.

It is an amenable number.

31425133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425133 is an equidigital number, since it uses as much as digits as its factorization.

31425133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 22.

The square root of 31425133 is about 5605.8124299695. The cubic root of 31425133 is about 315.5675766918.

Adding to 31425133 its reverse (33152413), we get a palindrome (64577546).

The spelling of 31425133 in words is "thirty-one million, four hundred twenty-five thousand, one hundred thirty-three".