22261151 has 4 divisors (see below), whose sum is σ = 24284904. Its totient is φ = 20237400.

The previous prime is 22261147. The next prime is 22261153. The reversal of 22261151 is 15116222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22261151 - 2² = 22261147 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 (22261153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011860 + ... + 1011881.

It is an arithmetic number, because the mean of its divisors is an integer number (6071226).

Almost surely, 2^22261151 is an apocalyptic number.

22261151 is a deficient number, since it is larger than the sum of its proper divisors (2023753).

22261151 is a wasteful number, since it uses less digits than its factorization.

22261151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023752.

The product of its digits is 240, while the sum is 20.

The square root of 22261151 is about 4718.1724216056. The cubic root of 22261151 is about 281.3082950109.

Adding to 22261151 its reverse (15116222), we get a palindrome (37377373).

Subtracting from 22261151 its reverse (15116222), we obtain a square (7144929 = 2673²).

The spelling of 22261151 in words is "twenty-two million, two hundred sixty-one thousand, one hundred fifty-one".