230402021 has 4 divisors (see below), whose sum is σ = 234307200. Its totient is φ = 226496844.

The previous prime is 230402009. The next prime is 230402023. The reversal of 230402021 is 120204032.

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.

It is a cyclic number.

It is not a de Polignac number, because 230402021 - 2¹⁰ = 230400997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230401987 and 230402005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230402023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1952501 + ... + 1952618.

It is an arithmetic number, because the mean of its divisors is an integer number (58576800).

Almost surely, 2^230402021 is an apocalyptic number.

It is an amenable number.

230402021 is a deficient number, since it is larger than the sum of its proper divisors (3905179).

230402021 is an equidigital number, since it uses as much as digits as its factorization.

230402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905178.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 230402021 is about 15178.9993411951. Note that the first 3 decimals coincide. The cubic root of 230402021 is about 613.0493383996.

Adding to 230402021 its reverse (120204032), we get a palindrome (350606053).

The spelling of 230402021 in words is "two hundred thirty million, four hundred two thousand, twenty-one".