22501465 has 8 divisors (see below), whose sum is σ = 30859200. Its totient is φ = 15429552.

The previous prime is 22501463. The next prime is 22501511. The reversal of 22501465 is 56410522.

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

It is a cyclic number.

It is not a de Polignac number, because 22501465 - 2¹ = 22501463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22501463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321415 + ... + 321484.

It is an arithmetic number, because the mean of its divisors is an integer number (3857400).

Almost surely, 2^22501465 is an apocalyptic number.

It is an amenable number.

22501465 is a deficient number, since it is larger than the sum of its proper divisors (8357735).

22501465 is an equidigital number, since it uses as much as digits as its factorization.

22501465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642911.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 22501465 is about 4743.5709122980. The cubic root of 22501465 is about 282.3169357215.

Adding to 22501465 its reverse (56410522), we get a palindrome (78911987).

The spelling of 22501465 in words is "twenty-two million, five hundred one thousand, four hundred sixty-five".