31719335953 has 2 divisors, whose sum is σ = 31719335954. Its totient is φ = 31719335952.

The previous prime is 31719335941. The next prime is 31719336013. The reversal of 31719335953 is 35953391713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30783404304 + 935931649 = 175452^2 + 30593^2 .

It is a cyclic number.

It is not a de Polignac number, because 31719335953 - 2²⁵ = 31685781521 is a prime.

It is a super-2 number, since 2×31719335953² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31719335897 and 31719335906.

It is not a weakly prime, because it can be changed into another prime (31719333953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15859667976 + 15859667977.

It is an arithmetic number, because the mean of its divisors is an integer number (15859667977).

Almost surely, 2^31719335953 is an apocalyptic number.

It is an amenable number.

31719335953 is a deficient number, since it is larger than the sum of its proper divisors (1).

31719335953 is an equidigital number, since it uses as much as digits as its factorization.

31719335953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1148175, while the sum is 49.

The spelling of 31719335953 in words is "thirty-one billion, seven hundred nineteen million, three hundred thirty-five thousand, nine hundred fifty-three".