230022521 has 4 divisors (see below), whose sum is σ = 233793444. Its totient is φ = 226251600.

The previous prime is 230022509. The next prime is 230022553. The reversal of 230022521 is 125220032.

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 6071296 + 223951225 = 2464^2 + 14965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230022521 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 230022521.

It is not an unprimeable number, because it can be changed into a prime (230022571) 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, 1885370 + ... + 1885491.

It is an arithmetic number, because the mean of its divisors is an integer number (58448361).

Almost surely, 2^230022521 is an apocalyptic number.

It is an amenable number.

230022521 is a deficient number, since it is larger than the sum of its proper divisors (3770923).

230022521 is an equidigital number, since it uses as much as digits as its factorization.

230022521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770922.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 230022521 is about 15166.4933653103. The cubic root of 230022521 is about 612.7125646228.

Adding to 230022521 its reverse (125220032), we get a palindrome (355242553).

The spelling of 230022521 in words is "two hundred thirty million, twenty-two thousand, five hundred twenty-one".