232221257 has 2 divisors, whose sum is σ = 232221258. Its totient is φ = 232221256.

The previous prime is 232221233. The next prime is 232221281. The reversal of 232221257 is 752122232.

It is a balanced prime because it is at equal distance from previous prime (232221233) and next prime (232221281).

It can be written as a sum of positive squares in only one way, i.e., 220552201 + 11669056 = 14851^2 + 3416^2 .

It is a cyclic number.

It is not a de Polignac number, because 232221257 - 2⁶ = 232221193 is a prime.

It is not a weakly prime, because it can be changed into another prime (232220257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116110628 + 116110629.

It is an arithmetic number, because the mean of its divisors is an integer number (116110629).

Almost surely, 2^232221257 is an apocalyptic number.

It is an amenable number.

232221257 is a deficient number, since it is larger than the sum of its proper divisors (1).

232221257 is an equidigital number, since it uses as much as digits as its factorization.

232221257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 26.

The square root of 232221257 is about 15238.8075977092. The cubic root of 232221257 is about 614.6586397407.

Adding to 232221257 its reverse (752122232), we get a palindrome (984343489).

The spelling of 232221257 in words is "two hundred thirty-two million, two hundred twenty-one thousand, two hundred fifty-seven".