31201311949 has 2 divisors, whose sum is σ = 31201311950. Its totient is φ = 31201311948.

The previous prime is 31201311919. The next prime is 31201312007. The reversal of 31201311949 is 94911310213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27195308100 + 4006003849 = 164910^2 + 63293^2 .

It is a cyclic number.

It is not a de Polignac number, because 31201311949 - 2²³ = 31192923341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31201311919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600655974 + 15600655975.

It is an arithmetic number, because the mean of its divisors is an integer number (15600655975).

Almost surely, 2^31201311949 is an apocalyptic number.

It is an amenable number.

31201311949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201311949 is an equidigital number, since it uses as much as digits as its factorization.

31201311949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 31201311949 in words is "thirty-one billion, two hundred one million, three hundred eleven thousand, nine hundred forty-nine".