220224775 has 12 divisors (see below), whose sum is σ = 281888704. Its totient is φ = 170496000.

The previous prime is 220224733. The next prime is 220224821. The reversal of 220224775 is 577422022.

It is not a de Polignac number, because 220224775 - 2¹³ = 220216583 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141306 + ... + 142855.

Almost surely, 2^220224775 is an apocalyptic number.

220224775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

220224775 is a deficient number, since it is larger than the sum of its proper divisors (61663929).

220224775 is a wasteful number, since it uses less digits than its factorization.

220224775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284202 (or 284197 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 220224775 is about 14839.9722034780. The cubic root of 220224775 is about 603.8865982662.

Adding to 220224775 its reverse (577422022), we get a palindrome (797646797).

The spelling of 220224775 in words is "two hundred twenty million, two hundred twenty-four thousand, seven hundred seventy-five".