3215958985 has 8 divisors (see below), whose sum is σ = 3870604296. Its totient is φ = 2565131520.

The previous prime is 3215958983. The next prime is 3215958989. The reversal of 3215958985 is 5898595123.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 732730761 + 2483228224 = 27069^2 + 49832^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3215958985 - 2¹ = 3215958983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3215958983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952606 + ... + 955975.

It is an arithmetic number, because the mean of its divisors is an integer number (483825537).

Almost surely, 2^3215958985 is an apocalyptic number.

It is an amenable number.

3215958985 is a deficient number, since it is larger than the sum of its proper divisors (654645311).

3215958985 is a wasteful number, since it uses less digits than its factorization.

3215958985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908923.

The product of its digits is 3888000, while the sum is 55.

The square root of 3215958985 is about 56709.4258919979. The cubic root of 3215958985 is about 1476.0582634357.

The spelling of 3215958985 in words is "three billion, two hundred fifteen million, nine hundred fifty-eight thousand, nine hundred eighty-five".