321497685 has 24 divisors (see below), whose sum is σ = 557747424. Its totient is φ = 171316320.

The previous prime is 321497681. The next prime is 321497731. The reversal of 321497685 is 586794123.

It is not a de Polignac number, because 321497685 - 2² = 321497681 is a prime.

It is a super-2 number, since 2×321497685² = 206721522920718450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 321497685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321497681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66190 + ... + 70880.

It is an arithmetic number, because the mean of its divisors is an integer number (23239476).

Almost surely, 2^321497685 is an apocalyptic number.

It is an amenable number.

321497685 is a deficient number, since it is larger than the sum of its proper divisors (236249739).

321497685 is a wasteful number, since it uses less digits than its factorization.

321497685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225 (or 6222 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 321497685 is about 17930.3565218319. The cubic root of 321497685 is about 685.0558037902.

The spelling of 321497685 in words is "three hundred twenty-one million, four hundred ninety-seven thousand, six hundred eighty-five".