220042501 has 4 divisors (see below), whose sum is σ = 251477152. Its totient is φ = 188607852.

The previous prime is 220042469. The next prime is 220042507. The reversal of 220042501 is 105240022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105240022 = 2 ⋅52620011.

It is a cyclic number.

It is not a de Polignac number, because 220042501 - 2⁵ = 220042469 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 (220042507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15717315 + ... + 15717328.

It is an arithmetic number, because the mean of its divisors is an integer number (62869288).

Almost surely, 2^220042501 is an apocalyptic number.

It is an amenable number.

220042501 is a deficient number, since it is larger than the sum of its proper divisors (31434651).

220042501 is an equidigital number, since it uses as much as digits as its factorization.

220042501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31434650.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 220042501 is about 14833.8296134208. The cubic root of 220042501 is about 603.7199454938.

Adding to 220042501 its reverse (105240022), we get a palindrome (325282523).

The spelling of 220042501 in words is "two hundred twenty million, forty-two thousand, five hundred one".