31461253 has 2 divisors, whose sum is σ = 31461254. Its totient is φ = 31461252.

The previous prime is 31461229. The next prime is 31461281. The reversal of 31461253 is 35216413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24820324 + 6640929 = 4982^2 + 2577^2 .

It is an emirp because it is prime and its reverse (35216413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31461253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31461223) by changing a digit.

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 as a sum of consecutive naturals, namely, 15730626 + 15730627.

It is an arithmetic number, because the mean of its divisors is an integer number (15730627).

Almost surely, 2^31461253 is an apocalyptic number.

It is an amenable number.

31461253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31461253 is an equidigital number, since it uses as much as digits as its factorization.

31461253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 31461253 is about 5609.0331608932. The cubic root of 31461253 is about 315.6884346963.

Adding to 31461253 its reverse (35216413), we get a palindrome (66677666).

The spelling of 31461253 in words is "thirty-one million, four hundred sixty-one thousand, two hundred fifty-three".