222201551 has 16 divisors (see below), whose sum is σ = 272401920. Its totient is φ = 178353120.

The previous prime is 222201527. The next prime is 222201557. The reversal of 222201551 is 155102222.

It is a happy number.

It is not a de Polignac number, because 222201551 - 2¹⁴ = 222185167 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 (222201557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30491 + ... + 37068.

It is an arithmetic number, because the mean of its divisors is an integer number (17025120).

Almost surely, 2^222201551 is an apocalyptic number.

222201551 is a deficient number, since it is larger than the sum of its proper divisors (50200369).

222201551 is a wasteful number, since it uses less digits than its factorization.

222201551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67606.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 222201551 is about 14906.4265000033. The cubic root of 222201551 is about 605.6880826432.

Adding to 222201551 its reverse (155102222), we get a palindrome (377303773).

The spelling of 222201551 in words is "two hundred twenty-two million, two hundred one thousand, five hundred fifty-one".