321240023 has 16 divisors (see below), whose sum is σ = 350945280. Its totient is φ = 292281696.

The previous prime is 321240019. The next prime is 321240037. The reversal of 321240023 is 320042123.

It is a cyclic number.

It is not a de Polignac number, because 321240023 - 2² = 321240019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321239983 and 321240010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321240053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294986 + ... + 296072.

It is an arithmetic number, because the mean of its divisors is an integer number (21934080).

Almost surely, 2^321240023 is an apocalyptic number.

321240023 is a deficient number, since it is larger than the sum of its proper divisors (29705257).

321240023 is a wasteful number, since it uses less digits than its factorization.

321240023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 321240023 is about 17923.1700042152. The cubic root of 321240023 is about 684.8727438671.

Adding to 321240023 its reverse (320042123), we get a palindrome (641282146).

The spelling of 321240023 in words is "three hundred twenty-one million, two hundred forty thousand, twenty-three".