222551001 has 12 divisors (see below), whose sum is σ = 321592128. Its totient is φ = 148307544.

The previous prime is 222550987. The next prime is 222551011. The reversal of 222551001 is 100155222.

It is not a de Polignac number, because 222551001 - 2⁷ = 222550873 is a prime.

It is a super-2 number, since 2×222551001² = 99057896092204002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222551011) 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 11 ways as a sum of consecutive naturals, for example, 39316 + ... + 44618.

It is an arithmetic number, because the mean of its divisors is an integer number (26799344).

Almost surely, 2^222551001 is an apocalyptic number.

It is an amenable number.

222551001 is a deficient number, since it is larger than the sum of its proper divisors (99041127).

222551001 is a wasteful number, since it uses less digits than its factorization.

222551001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9972 (or 9969 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 222551001 is about 14918.1433496263. The cubic root of 222551001 is about 606.0054324252.

The spelling of 222551001 in words is "two hundred twenty-two million, five hundred fifty-one thousand, one".