22307145 has 32 divisors (see below), whose sum is σ = 43193088. Its totient is φ = 9596928.

The previous prime is 22307107. The next prime is 22307147. The reversal of 22307145 is 54170322.

It is not a de Polignac number, because 22307145 - 2⁷ = 22307017 is a prime.

It is a super-3 number, since 3×22307145³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22307147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4464 + ... + 8033.

It is an arithmetic number, because the mean of its divisors is an integer number (1349784).

Almost surely, 2^22307145 is an apocalyptic number.

It is an amenable number.

22307145 is a deficient number, since it is larger than the sum of its proper divisors (20885943).

22307145 is a wasteful number, since it uses less digits than its factorization.

22307145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 22307145 is about 4723.0440395999. The cubic root of 22307145 is about 281.5018997524.

Adding to 22307145 its reverse (54170322), we get a palindrome (76477467).

The spelling of 22307145 in words is "twenty-two million, three hundred seven thousand, one hundred forty-five".