220432401 has 32 divisors (see below), whose sum is σ = 373989120. Its totient is φ = 125701632.

The previous prime is 220432363. The next prime is 220432427. The reversal of 220432401 is 104234022.

220432401 is a `hidden beast` number, since 220 + 43 + 2 + 401 = 666.

It is not a de Polignac number, because 220432401 - 2¹³ = 220424209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220432481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126331 + ... + 128063.

It is an arithmetic number, because the mean of its divisors is an integer number (11687160).

Almost surely, 2^220432401 is an apocalyptic number.

220432401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

220432401 is a deficient number, since it is larger than the sum of its proper divisors (153556719).

220432401 is a wasteful number, since it uses less digits than its factorization.

220432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2422 (or 2416 counting only the distinct ones).

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

The square root of 220432401 is about 14846.9660537094. The cubic root of 220432401 is about 604.0763183318.

Adding to 220432401 its reverse (104234022), we get a palindrome (324666423).

The spelling of 220432401 in words is "two hundred twenty million, four hundred thirty-two thousand, four hundred one".