230281821 has 72 divisors (see below), whose sum is σ = 433858464. Its totient is φ = 116303040.

The previous prime is 230281801. The next prime is 230281867. The reversal of 230281821 is 128182032.

It is not a de Polignac number, because 230281821 - 2⁷ = 230281693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230281801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 178846 + ... + 180128.

It is an arithmetic number, because the mean of its divisors is an integer number (6025812).

Almost surely, 2^230281821 is an apocalyptic number.

230281821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

230281821 is a deficient number, since it is larger than the sum of its proper divisors (203576643).

230281821 is a wasteful number, since it uses less digits than its factorization.

230281821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 230281821 is about 15175.0394068681. The cubic root of 230281821 is about 612.9427112265.

The spelling of 230281821 in words is "two hundred thirty million, two hundred eighty-one thousand, eight hundred twenty-one".