22791145 has 16 divisors (see below), whose sum is σ = 29553552. Its totient is φ = 16773120.

The previous prime is 22791133. The next prime is 22791151. The reversal of 22791145 is 54119722.

It can be written as a sum of positive squares in 8 ways, for example, as 4575321 + 18215824 = 2139^2 + 4268^2 .

It is not a de Polignac number, because 22791145 - 2¹⁵ = 22758377 is a prime.

It is a super-2 number, since 2×22791145² = 1038872580822050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33529 + ... + 34201.

It is an arithmetic number, because the mean of its divisors is an integer number (1847097).

Almost surely, 2^22791145 is an apocalyptic number.

It is an amenable number.

22791145 is a deficient number, since it is larger than the sum of its proper divisors (6762407).

22791145 is a wasteful number, since it uses less digits than its factorization.

22791145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its digits is 5040, while the sum is 31.

The square root of 22791145 is about 4774.0072266389. The cubic root of 22791145 is about 283.5232736394.

The spelling of 22791145 in words is "twenty-two million, seven hundred ninety-one thousand, one hundred forty-five".