222821157 has 16 divisors (see below), whose sum is σ = 321370560. Its totient is φ = 136511232.

The previous prime is 222821153. The next prime is 222821167. The reversal of 222821157 is 751128222.

It is not a de Polignac number, because 222821157 - 2² = 222821153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222821153) 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, 3732 + ... + 21437.

It is an arithmetic number, because the mean of its divisors is an integer number (20085660).

Almost surely, 2^222821157 is an apocalyptic number.

It is an amenable number.

222821157 is a deficient number, since it is larger than the sum of its proper divisors (98549403).

222821157 is a wasteful number, since it uses less digits than its factorization.

222821157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25412.

The product of its digits is 4480, while the sum is 30.

The square root of 222821157 is about 14927.1952154449. The cubic root of 222821157 is about 606.2505444853.

Adding to 222821157 its reverse (751128222), we get a palindrome (973949379).

The spelling of 222821157 in words is "two hundred twenty-two million, eight hundred twenty-one thousand, one hundred fifty-seven".