31249252949 has 2 divisors, whose sum is σ = 31249252950. Its totient is φ = 31249252948.

The previous prime is 31249252913. The next prime is 31249252961. The reversal of 31249252949 is 94925294213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26693677924 + 4555575025 = 163382^2 + 67495^2 .

It is a cyclic number.

It is not a de Polignac number, because 31249252949 - 2¹⁶ = 31249187413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31249252897 and 31249252906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31249252999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624626474 + 15624626475.

It is an arithmetic number, because the mean of its divisors is an integer number (15624626475).

Almost surely, 2^31249252949 is an apocalyptic number.

It is an amenable number.

31249252949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31249252949 is an equidigital number, since it uses as much as digits as its factorization.

31249252949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The spelling of 31249252949 in words is "thirty-one billion, two hundred forty-nine million, two hundred fifty-two thousand, nine hundred forty-nine".