232021391 has 8 divisors (see below), whose sum is σ = 273721344. Its totient is φ = 192459960.

The previous prime is 232021367. The next prime is 232021393. The reversal of 232021391 is 193120232.

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

It is not a de Polignac number, because 232021391 - 2¹⁰ = 232020367 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 (232021393) 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 7 ways as a sum of consecutive naturals, for example, 534395 + ... + 534828.

It is an arithmetic number, because the mean of its divisors is an integer number (34215168).

Almost surely, 2^232021391 is an apocalyptic number.

232021391 is a deficient number, since it is larger than the sum of its proper divisors (41699953).

232021391 is a wasteful number, since it uses less digits than its factorization.

232021391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069261.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 232021391 is about 15232.2483895189. The cubic root of 232021391 is about 614.4822495939.

The spelling of 232021391 in words is "two hundred thirty-two million, twenty-one thousand, three hundred ninety-one".