230655821 has 16 divisors (see below), whose sum is σ = 262915200. Its totient is φ = 200424000.

The previous prime is 230655811. The next prime is 230655833. The reversal of 230655821 is 128556032.

It is a cyclic number.

It is not a de Polignac number, because 230655821 - 2²² = 226461517 is a prime.

It is a super-2 number, since 2×230655821² = 106404215522368082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230655811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28640 + ... + 35798.

It is an arithmetic number, because the mean of its divisors is an integer number (16432200).

Almost surely, 2^230655821 is an apocalyptic number.

It is an amenable number.

230655821 is a deficient number, since it is larger than the sum of its proper divisors (32259379).

230655821 is a wasteful number, since it uses less digits than its factorization.

230655821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 230655821 is about 15187.3572750495. The cubic root of 230655821 is about 613.2743578756.

The spelling of 230655821 in words is "two hundred thirty million, six hundred fifty-five thousand, eight hundred twenty-one".