230142221 has 4 divisors (see below), whose sum is σ = 235038912. Its totient is φ = 225245532.

The previous prime is 230142197. The next prime is 230142281. The reversal of 230142221 is 122241032.

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 a de Polignac number, because none of the positive numbers 2^k-230142221 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 230142221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230142281) 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, 2448275 + ... + 2448368.

It is an arithmetic number, because the mean of its divisors is an integer number (58759728).

Almost surely, 2^230142221 is an apocalyptic number.

It is an amenable number.

230142221 is a deficient number, since it is larger than the sum of its proper divisors (4896691).

230142221 is an equidigital number, since it uses as much as digits as its factorization.

230142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896690.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 230142221 is about 15170.4390509965. The cubic root of 230142221 is about 612.8188280956.

Adding to 230142221 its reverse (122241032), we get a palindrome (352383253).

The spelling of 230142221 in words is "two hundred thirty million, one hundred forty-two thousand, two hundred twenty-one".