232139221 has 16 divisors (see below), whose sum is σ = 244194688. Its totient is φ = 220449600.

The previous prime is 232139203. The next prime is 232139263. The reversal of 232139221 is 122931232.

It is a cyclic number.

It is not a de Polignac number, because 232139221 - 2⁵ = 232139189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232139021) 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, 367576 + ... + 368206.

It is an arithmetic number, because the mean of its divisors is an integer number (15262168).

Almost surely, 2^232139221 is an apocalyptic number.

It is an amenable number.

232139221 is a deficient number, since it is larger than the sum of its proper divisors (12055467).

232139221 is a wasteful number, since it uses less digits than its factorization.

232139221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its digits is 1296, while the sum is 25.

The square root of 232139221 is about 15236.1156795293. The cubic root of 232139221 is about 614.5862517723.

The spelling of 232139221 in words is "two hundred thirty-two million, one hundred thirty-nine thousand, two hundred twenty-one".