31540604519 has 2 divisors, whose sum is σ = 31540604520. Its totient is φ = 31540604518.

The previous prime is 31540604461. The next prime is 31540604521. The reversal of 31540604519 is 91540604513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31540604519 - 2¹² = 31540600423 is a prime.

It is a super-2 number, since 2×31540604519² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 31540604521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31540604549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770302259 + 15770302260.

It is an arithmetic number, because the mean of its divisors is an integer number (15770302260).

Almost surely, 2^31540604519 is an apocalyptic number.

31540604519 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540604519 is an equidigital number, since it uses as much as digits as its factorization.

31540604519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 31540604519 in words is "thirty-one billion, five hundred forty million, six hundred four thousand, five hundred nineteen".