31273630985 has 4 divisors (see below), whose sum is σ = 37528357188. Its totient is φ = 25018904784.

The previous prime is 31273630979. The next prime is 31273630991. The reversal of 31273630985 is 58903637213.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (31273630979) and next prime (31273630991).

It can be written as a sum of positive squares in 2 ways, for example, as 6555817024 + 24717813961 = 80968^2 + 157219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31273630985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3127363094 + ... + 3127363103.

It is an arithmetic number, because the mean of its divisors is an integer number (9382089297).

Almost surely, 2^31273630985 is an apocalyptic number.

It is an amenable number.

31273630985 is a deficient number, since it is larger than the sum of its proper divisors (6254726203).

31273630985 is an equidigital number, since it uses as much as digits as its factorization.

31273630985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254726202.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 31273630985 in words is "thirty-one billion, two hundred seventy-three million, six hundred thirty thousand, nine hundred eighty-five".