31204250653 has 2 divisors, whose sum is σ = 31204250654. Its totient is φ = 31204250652.

The previous prime is 31204250629. The next prime is 31204250659. The reversal of 31204250653 is 35605240213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26097433209 + 5106817444 = 161547^2 + 71462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31204250653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31204250659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15602125326 + 15602125327.

It is an arithmetic number, because the mean of its divisors is an integer number (15602125327).

Almost surely, 2^31204250653 is an apocalyptic number.

It is an amenable number.

31204250653 is a deficient number, since it is larger than the sum of its proper divisors (1).

31204250653 is an equidigital number, since it uses as much as digits as its factorization.

31204250653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 31204250653 its reverse (35605240213), we get a palindrome (66809490866).

The spelling of 31204250653 in words is "thirty-one billion, two hundred four million, two hundred fifty thousand, six hundred fifty-three".