2303213021 has 8 divisors (see below), whose sum is σ = 2309259960. Its totient is φ = 2297175552.

The previous prime is 2303212993. The next prime is 2303213039. The reversal of 2303213021 is 1203123032.

2303213021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 89510521 + 2213702500 = 9461^2 + 47050^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2303213021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2303213921) 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, 778481 + ... + 781433.

It is an arithmetic number, because the mean of its divisors is an integer number (288657495).

Almost surely, 2^2303213021 is an apocalyptic number.

It is an amenable number.

2303213021 is a deficient number, since it is larger than the sum of its proper divisors (6046939).

2303213021 is a wasteful number, since it uses less digits than its factorization.

2303213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2303213021 is about 47991.8016019403. The cubic root of 2303213021 is about 1320.6205035322.

Adding to 2303213021 its reverse (1203123032), we get a palindrome (3506336053).

The spelling of 2303213021 in words is "two billion, three hundred three million, two hundred thirteen thousand, twenty-one".