231262221 has 8 divisors (see below), whose sum is σ = 309550464. Its totient is φ = 153574400.

The previous prime is 231262193. The next prime is 231262249. The reversal of 231262221 is 122262132.

It is an interprime number because it is at equal distance from previous prime (231262193) and next prime (231262249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231262221 - 2¹¹ = 231260173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231262261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149205 + ... + 150746.

It is an arithmetic number, because the mean of its divisors is an integer number (38693808).

Almost surely, 2^231262221 is an apocalyptic number.

It is an amenable number.

231262221 is a deficient number, since it is larger than the sum of its proper divisors (78288243).

231262221 is a wasteful number, since it uses less digits than its factorization.

231262221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300211.

The product of its digits is 576, while the sum is 21.

The square root of 231262221 is about 15207.3081444416. The cubic root of 231262221 is about 613.8113255270.

The spelling of 231262221 in words is "two hundred thirty-one million, two hundred sixty-two thousand, two hundred twenty-one".