31000402229 has 2 divisors, whose sum is σ = 31000402230. Its totient is φ = 31000402228.

The previous prime is 31000402117. The next prime is 31000402243. The reversal of 31000402229 is 92220400013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23655055204 + 7345347025 = 153802^2 + 85705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31000402229 is a prime.

It is a super-2 number, since 2×31000402229² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31000402249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500201114 + 15500201115.

It is an arithmetic number, because the mean of its divisors is an integer number (15500201115).

Almost surely, 2^31000402229 is an apocalyptic number.

It is an amenable number.

31000402229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000402229 is an equidigital number, since it uses as much as digits as its factorization.

31000402229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 31000402229 in words is "thirty-one billion, four hundred two thousand, two hundred twenty-nine".