321375601 has 4 divisors (see below), whose sum is σ = 321946992. Its totient is φ = 320804212.

The previous prime is 321375583. The next prime is 321375611. The reversal of 321375601 is 106573123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106573123 = 263 ⋅405221.

It is a cyclic number.

It is not a de Polignac number, because 321375601 - 2¹¹ = 321373553 is a prime.

It is a super-2 number, since 2×321375601² = 206564553836222402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321375601.

It is not an unprimeable number, because it can be changed into a prime (321375611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284851 + ... + 285976.

It is an arithmetic number, because the mean of its divisors is an integer number (80486748).

Almost surely, 2^321375601 is an apocalyptic number.

It is an amenable number.

321375601 is a deficient number, since it is larger than the sum of its proper divisors (571391).

321375601 is an equidigital number, since it uses as much as digits as its factorization.

321375601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571390.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 321375601 is about 17926.9518044759. The cubic root of 321375601 is about 684.9690795356.

It can be divided in two parts, 32137560 and 1, that added together give a square (32137561 = 5669²).

The spelling of 321375601 in words is "three hundred twenty-one million, three hundred seventy-five thousand, six hundred one".