22151156 has 6 divisors (see below), whose sum is σ = 38764530. Its totient is φ = 11075576.

The previous prime is 22151117. The next prime is 22151159. The reversal of 22151156 is 65115122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 2044900 = 4484^2 + 1430^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22151159) 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 as a sum of consecutive naturals, namely, 2768891 + ... + 2768898.

It is an arithmetic number, because the mean of its divisors is an integer number (6460755).

Almost surely, 2^22151156 is an apocalyptic number.

It is an amenable number.

22151156 is a deficient number, since it is larger than the sum of its proper divisors (16613374).

22151156 is a wasteful number, since it uses less digits than its factorization.

22151156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537793 (or 5537791 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 22151156 is about 4706.5014607456. The cubic root of 22151156 is about 280.8442038564.

Adding to 22151156 its reverse (65115122), we get a palindrome (87266278).

The spelling of 22151156 in words is "twenty-two million, one hundred fifty-one thousand, one hundred fifty-six".