22520275 has 24 divisors (see below), whose sum is σ = 28998144. Its totient is φ = 17337600.

The previous prime is 22520249. The next prime is 22520297. The reversal of 22520275 is 57202522.

It is a de Polignac number, because none of the positive numbers 2^k-22520275 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian 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, 130089 + ... + 130261.

It is an arithmetic number, because the mean of its divisors is an integer number (1208256).

Almost surely, 2^22520275 is an apocalyptic number.

22520275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22520275 is a deficient number, since it is larger than the sum of its proper divisors (6477869).

22520275 is a wasteful number, since it uses less digits than its factorization.

22520275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 22520275 is about 4745.5531816639. The cubic root of 22520275 is about 282.3955810085.

Adding to 22520275 its reverse (57202522), we get a palindrome (79722797).

The spelling of 22520275 in words is "twenty-two million, five hundred twenty thousand, two hundred seventy-five".