31670520919 has 2 divisors, whose sum is σ = 31670520920. Its totient is φ = 31670520918.

The previous prime is 31670520877. The next prime is 31670520977. The reversal of 31670520919 is 91902507613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31670520919 - 2²³ = 31662132311 is a prime.

It is a super-2 number, since 2×31670520919² (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 (31670520319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15835260459 + 15835260460.

It is an arithmetic number, because the mean of its divisors is an integer number (15835260460).

Almost surely, 2^31670520919 is an apocalyptic number.

31670520919 is a deficient number, since it is larger than the sum of its proper divisors (1).

31670520919 is an equidigital number, since it uses as much as digits as its factorization.

31670520919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 31670520919 in words is "thirty-one billion, six hundred seventy million, five hundred twenty thousand, nine hundred nineteen".