22040001 has 12 divisors (see below), whose sum is σ = 32612580. Its totient is φ = 14334720.

The previous prime is 22039999. The next prime is 22040009. The reversal of 22040001 is 10004022.

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 17438976 = 2145^2 + 4176^2 .

It is not a de Polignac number, because 22040001 - 2¹ = 22039999 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (22040009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29496 + ... + 30233.

It is an arithmetic number, because the mean of its divisors is an integer number (2717715).

Almost surely, 2^22040001 is an apocalyptic number.

It is an amenable number.

22040001 is a deficient number, since it is larger than the sum of its proper divisors (10572579).

22040001 is a wasteful number, since it uses less digits than its factorization.

22040001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59776 (or 59773 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22040001 is about 4694.6779442258. The cubic root of 22040001 is about 280.3736550537.

Adding to 22040001 its reverse (10004022), we get a palindrome (32044023).

The spelling of 22040001 in words is "twenty-two million, forty thousand, one".