22781151 has 18 divisors (see below), whose sum is σ = 33509840. Its totient is φ = 14911416.

The previous prime is 22781113. The next prime is 22781167. The reversal of 22781151 is 15118722.

It is not a de Polignac number, because 22781151 - 2¹¹ = 22779103 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 (22781111) 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 17 ways as a sum of consecutive naturals, for example, 127180 + ... + 127358.

Almost surely, 2^22781151 is an apocalyptic number.

22781151 is a deficient number, since it is larger than the sum of its proper divisors (10728689).

22781151 is an equidigital number, since it uses as much as digits as its factorization.

22781151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 261 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 22781151 is about 4772.9604020985. The cubic root of 22781151 is about 283.4818255848.

Adding to 22781151 its reverse (15118722), we get a palindrome (37899873).

The spelling of 22781151 in words is "twenty-two million, seven hundred eighty-one thousand, one hundred fifty-one".