22251045 has 32 divisors (see below), whose sum is σ = 38257920. Its totient is φ = 11002880.

The previous prime is 22251041. The next prime is 22251049. The reversal of 22251045 is 54015222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22251041) and next prime (22251049).

It is not a de Polignac number, because 22251045 - 2² = 22251041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17491 + ... + 18719.

It is an arithmetic number, because the mean of its divisors is an integer number (1195560).

Almost surely, 2^22251045 is an apocalyptic number.

It is an amenable number.

22251045 is a deficient number, since it is larger than the sum of its proper divisors (16006875).

22251045 is a wasteful number, since it uses less digits than its factorization.

22251045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 22251045 is about 4717.1013345062. The cubic root of 22251045 is about 281.2657196152.

Adding to 22251045 its reverse (54015222), we get a palindrome (76266267).

The spelling of 22251045 in words is "twenty-two million, two hundred fifty-one thousand, forty-five".