22251575 has 6 divisors (see below), whose sum is σ = 27591984. Its totient is φ = 17801240.

The previous prime is 22251569. The next prime is 22251599. The reversal of 22251575 is 57515222.

It is not a de Polignac number, because 22251575 - 2¹⁸ = 21989431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445007 + ... + 445056.

It is an arithmetic number, because the mean of its divisors is an integer number (4598664).

Almost surely, 2^22251575 is an apocalyptic number.

22251575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22251575 is a deficient number, since it is larger than the sum of its proper divisors (5340409).

22251575 is an equidigital number, since it uses as much as digits as its factorization.

22251575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890073 (or 890068 counting only the distinct ones).

The product of its digits is 7000, while the sum is 29.

The square root of 22251575 is about 4717.1575127401. The cubic root of 22251575 is about 281.2679527635.

Adding to 22251575 its reverse (57515222), we get a palindrome (79766797).

The spelling of 22251575 in words is "twenty-two million, two hundred fifty-one thousand, five hundred seventy-five".