22013001 has 48 divisors (see below), whose sum is σ = 36316800. Its totient is φ = 12773376.

The previous prime is 22012981. The next prime is 22013021. The reversal of 22013001 is 10031022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22012981) and next prime (22013021).

It is not a de Polignac number, because 22013001 - 2⁶ = 22012937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013021) 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 47 ways as a sum of consecutive naturals, for example, 113961 + ... + 114153.

It is an arithmetic number, because the mean of its divisors is an integer number (756600).

Almost surely, 2^22013001 is an apocalyptic number.

It is an amenable number.

22013001 is a deficient number, since it is larger than the sum of its proper divisors (14303799).

22013001 is a wasteful number, since it uses less digits than its factorization.

22013001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 22013001 is about 4691.8014663879. The cubic root of 22013001 is about 280.2591181256.

Adding to 22013001 its reverse (10031022), we get a palindrome (32044023).

The spelling of 22013001 in words is "twenty-two million, thirteen thousand, one".