22145274 has 48 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 6993888.

The previous prime is 22145269. The next prime is 22145287. The reversal of 22145274 is 47254122.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61507 + ... + 61865.

It is an arithmetic number, because the mean of its divisors is an integer number (1053000).

Almost surely, 2^22145274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22145274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25272000).

22145274 is an abundant number, since it is smaller than the sum of its proper divisors (28398726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22145274 is a wasteful number, since it uses less digits than its factorization.

22145274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 536 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 22145274 is about 4705.8765389670. The cubic root of 22145274 is about 280.8193432751.

Adding to 22145274 its reverse (47254122), we get a palindrome (69399396).

The spelling of 22145274 in words is "twenty-two million, one hundred forty-five thousand, two hundred seventy-four".