22245257 has 4 divisors (see below), whose sum is σ = 23416080. Its totient is φ = 21074436.

The previous prime is 22245227. The next prime is 22245263. The reversal of 22245257 is 75254222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75254222 = 2 ⋅37627111.

It is a cyclic number.

It is not a de Polignac number, because 22245257 - 2¹⁴ = 22228873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22245227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585383 + ... + 585420.

It is an arithmetic number, because the mean of its divisors is an integer number (5854020).

Almost surely, 2^22245257 is an apocalyptic number.

It is an amenable number.

22245257 is a deficient number, since it is larger than the sum of its proper divisors (1170823).

22245257 is a wasteful number, since it uses less digits than its factorization.

22245257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170822.

The product of its digits is 11200, while the sum is 29.

The square root of 22245257 is about 4716.4877822380. The cubic root of 22245257 is about 281.2413296422.

Adding to 22245257 its reverse (75254222), we get a palindrome (97499479).

The spelling of 22245257 in words is "twenty-two million, two hundred forty-five thousand, two hundred fifty-seven".