22001015 has 4 divisors (see below), whose sum is σ = 26401224. Its totient is φ = 17600808.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001015 is 51010022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22001015 - 2¹⁴ = 21984631 is a prime.

It is a super-2 number, since 2×22001015² = 968089322060450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22000987 and 22001005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200097 + ... + 2200106.

It is an arithmetic number, because the mean of its divisors is an integer number (6600306).

Almost surely, 2^22001015 is an apocalyptic number.

22001015 is a deficient number, since it is larger than the sum of its proper divisors (4400209).

22001015 is an equidigital number, since it uses as much as digits as its factorization.

22001015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400208.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 22001015 is about 4690.5239579390. The cubic root of 22001015 is about 280.2082421961.

Adding to 22001015 its reverse (51010022), we get a palindrome (73011037).

The spelling of 22001015 in words is "twenty-two million, one thousand, fifteen".