232421643 has 10 divisors (see below), whose sum is σ = 347197884. Its totient is φ = 154947708.

The previous prime is 232421639. The next prime is 232421653. The reversal of 232421643 is 346124232.

232421643 is a `hidden beast` number, since 232 + 421 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 232421643 - 2² = 232421639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (232421633) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1434621 + ... + 1434782.

Almost surely, 2^232421643 is an apocalyptic number.

232421643 is a deficient number, since it is larger than the sum of its proper divisors (114776241).

232421643 is an equidigital number, since it uses as much as digits as its factorization.

232421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869415 (or 2869406 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 232421643 is about 15245.3810382030. The cubic root of 232421643 is about 614.8353872341.

Adding to 232421643 its reverse (346124232), we get a palindrome (578545875).

It can be divided in two parts, 232 and 421643, that added together give a cube (421875 = 75³).

The spelling of 232421643 in words is "two hundred thirty-two million, four hundred twenty-one thousand, six hundred forty-three".