31000311149 has 2 divisors, whose sum is σ = 31000311150. Its totient is φ = 31000311148.

The previous prime is 31000311101. The next prime is 31000311151. The reversal of 31000311149 is 94111300013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28321524100 + 2678787049 = 168290^2 + 51757^2 .

It is a cyclic number.

It is not a de Polignac number, because 31000311149 - 2²⁰ = 30999262573 is a prime.

It is a super-2 number, since 2×31000311149² (a number of 22 digits) contains 22 as substring.

Together with 31000311151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000311179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500155574 + 15500155575.

It is an arithmetic number, because the mean of its divisors is an integer number (15500155575).

Almost surely, 2^31000311149 is an apocalyptic number.

It is an amenable number.

31000311149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000311149 is an equidigital number, since it uses as much as digits as its factorization.

31000311149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 31000311149 in words is "thirty-one billion, three hundred eleven thousand, one hundred forty-nine".