331137685 has 4 divisors (see below), whose sum is σ = 397365228. Its totient is φ = 264910144.

The previous prime is 331137671. The next prime is 331137721. The reversal of 331137685 is 586731133.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44275716 + 286861969 = 6654^2 + 16937^2 .

It is a cyclic number.

It is not a de Polignac number, because 331137685 - 2¹³ = 331129493 is a prime.

It is a Duffinian number.

It is a congruent 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, 33113764 + ... + 33113773.

It is an arithmetic number, because the mean of its divisors is an integer number (99341307).

Almost surely, 2^331137685 is an apocalyptic number.

It is an amenable number.

331137685 is a deficient number, since it is larger than the sum of its proper divisors (66227543).

331137685 is an equidigital number, since it uses as much as digits as its factorization.

331137685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66227542.

The product of its digits is 45360, while the sum is 37.

The square root of 331137685 is about 18197.1889312608. The cubic root of 331137685 is about 691.8355419326.

The spelling of 331137685 in words is "three hundred thirty-one million, one hundred thirty-seven thousand, six hundred eighty-five".