31103225617 has 2 divisors, whose sum is σ = 31103225618. Its totient is φ = 31103225616.

The previous prime is 31103225599. The next prime is 31103225639. The reversal of 31103225617 is 71652230113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25052874961 + 6050350656 = 158281^2 + 77784^2 .

It is an emirp because it is prime and its reverse (71652230113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31103225617 - 2²³ = 31094837009 is a prime.

It is not a weakly prime, because it can be changed into another prime (31103225117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551612808 + 15551612809.

It is an arithmetic number, because the mean of its divisors is an integer number (15551612809).

Almost surely, 2^31103225617 is an apocalyptic number.

It is an amenable number.

31103225617 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103225617 is an equidigital number, since it uses as much as digits as its factorization.

31103225617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 31103225617 in words is "thirty-one billion, one hundred three million, two hundred twenty-five thousand, six hundred seventeen".