230408021 has 4 divisors (see below), whose sum is σ = 243961452. Its totient is φ = 216854592.

The previous prime is 230408011. The next prime is 230408023. The reversal of 230408021 is 120804032.

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 139948900 + 90459121 = 11830^2 + 9511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230408021 is a prime.

It is a super-2 number, since 2×230408021² = 106175712282272882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230407984 and 230408002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230408023) 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, 6776690 + ... + 6776723.

It is an arithmetic number, because the mean of its divisors is an integer number (60990363).

Almost surely, 2^230408021 is an apocalyptic number.

It is an amenable number.

230408021 is a deficient number, since it is larger than the sum of its proper divisors (13553431).

230408021 is a wasteful number, since it uses less digits than its factorization.

230408021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13553430.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 230408021 is about 15179.1969813953. The cubic root of 230408021 is about 613.0546599156.

The spelling of 230408021 in words is "two hundred thirty million, four hundred eight thousand, twenty-one".