220232421 has 12 divisors (see below), whose sum is σ = 318663072. Its totient is φ = 146567976.

The previous prime is 220232381. The next prime is 220232461. The reversal of 220232421 is 124232022.

220232421 is a `hidden beast` number, since 220 + 23 + 2 + 421 = 666.

220232421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (220232381) and next prime (220232461).

It is not a de Polignac number, because 220232421 - 2⁹ = 220231909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220232394 and 220232403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220232461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15561 + ... + 26126.

It is an arithmetic number, because the mean of its divisors is an integer number (26555256).

Almost surely, 2^220232421 is an apocalyptic number.

It is an amenable number.

220232421 is a deficient number, since it is larger than the sum of its proper divisors (98430651).

220232421 is a wasteful number, since it uses less digits than its factorization.

220232421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42280 (or 42277 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220232421 is about 14840.2298162798. The cubic root of 220232421 is about 603.8935869796.

Adding to 220232421 its reverse (124232022), we get a palindrome (344464443).

The spelling of 220232421 in words is "two hundred twenty million, two hundred thirty-two thousand, four hundred twenty-one".