220242551 has 8 divisors (see below), whose sum is σ = 221888160. Its totient is φ = 218603392.

The previous prime is 220242527. The next prime is 220242557. The reversal of 220242551 is 155242022.

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

It is a cyclic number.

It is not a de Polignac number, because 220242551 - 2¹⁸ = 219980407 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 (220242557) 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 7 ways as a sum of consecutive naturals, for example, 82331 + ... + 84963.

It is an arithmetic number, because the mean of its divisors is an integer number (27736020).

Almost surely, 2^220242551 is an apocalyptic number.

220242551 is a deficient number, since it is larger than the sum of its proper divisors (1645609).

220242551 is a wasteful number, since it uses less digits than its factorization.

220242551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 220242551 is about 14840.5711143473. The cubic root of 220242551 is about 603.9028459073.

Adding to 220242551 its reverse (155242022), we get a palindrome (375484573).

The spelling of 220242551 in words is "two hundred twenty million, two hundred forty-two thousand, five hundred fifty-one".