22251345 has 8 divisors (see below), whose sum is σ = 35602176. Its totient is φ = 11867376.

The previous prime is 22251343. The next prime is 22251367. The reversal of 22251345 is 54315222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22251345 - 2¹ = 22251343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22251343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741697 + ... + 741726.

It is an arithmetic number, because the mean of its divisors is an integer number (4450272).

Almost surely, 2^22251345 is an apocalyptic number.

It is an amenable number.

22251345 is a deficient number, since it is larger than the sum of its proper divisors (13350831).

22251345 is a wasteful number, since it uses less digits than its factorization.

22251345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483431.

The product of its digits is 2400, while the sum is 24.

The square root of 22251345 is about 4717.1331335887. The cubic root of 22251345 is about 281.2669836658.

Adding to 22251345 its reverse (54315222), we get a palindrome (76566567).

It can be divided in two parts, 2225 and 1345, that added together give a triangular number (3570 = T₈₄).

The spelling of 22251345 in words is "twenty-two million, two hundred fifty-one thousand, three hundred forty-five".