31103253109 has 2 divisors, whose sum is σ = 31103253110. Its totient is φ = 31103253108.

The previous prime is 31103252993. The next prime is 31103253113. The reversal of 31103253109 is 90135230113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31085216100 + 18037009 = 176310^2 + 4247^2 .

It is an emirp because it is prime and its reverse (90135230113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31103253109 - 2¹⁵ = 31103220341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31103253169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551626554 + 15551626555.

It is an arithmetic number, because the mean of its divisors is an integer number (15551626555).

Almost surely, 2^31103253109 is an apocalyptic number.

It is an amenable number.

31103253109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31103253109 is an equidigital number, since it uses as much as digits as its factorization.

31103253109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The spelling of 31103253109 in words is "thirty-one billion, one hundred three million, two hundred fifty-three thousand, one hundred nine".