2306401021 has 4 divisors (see below), whose sum is σ = 2313677052. Its totient is φ = 2299124992.

The previous prime is 2306400997. The next prime is 2306401043. The reversal of 2306401021 is 1201046032.

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 100220121 + 2206180900 = 10011^2 + 46970^2 .

It is a cyclic number.

It is not a de Polignac number, because 2306401021 - 2⁷ = 2306400893 is a prime.

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 2306401021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2306401081) 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, 3637540 + ... + 3638173.

It is an arithmetic number, because the mean of its divisors is an integer number (578419263).

Almost surely, 2^2306401021 is an apocalyptic number.

It is an amenable number.

2306401021 is a deficient number, since it is larger than the sum of its proper divisors (7276031).

2306401021 is an equidigital number, since it uses as much as digits as its factorization.

2306401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276030.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2306401021 is about 48025.0041228525. The cubic root of 2306401021 is about 1321.2295363814.

Adding to 2306401021 its reverse (1201046032), we get a palindrome (3507447053).

The spelling of 2306401021 in words is "two billion, three hundred six million, four hundred one thousand, twenty-one".