230887521 has 6 divisors (see below), whose sum is σ = 333504210. Its totient is φ = 153925008.

The previous prime is 230887513. The next prime is 230887529. The reversal of 230887521 is 125788032.

It is an interprime number because it is at equal distance from previous prime (230887513) and next prime (230887529).

It can be written as a sum of positive squares in only one way, i.e., 180633600 + 50253921 = 13440^2 + 7089^2 .

It is not a de Polignac number, because 230887521 - 2³ = 230887513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (230887529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12827076 + ... + 12827093.

It is an arithmetic number, because the mean of its divisors is an integer number (55584035).

Almost surely, 2^230887521 is an apocalyptic number.

It is an amenable number.

230887521 is a deficient number, since it is larger than the sum of its proper divisors (102616689).

230887521 is a wasteful number, since it uses less digits than its factorization.

230887521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25654175 (or 25654172 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 230887521 is about 15194.9834155882. The cubic root of 230887521 is about 613.4796393711.

The spelling of 230887521 in words is "two hundred thirty million, eight hundred eighty-seven thousand, five hundred twenty-one".