22709001 has 32 divisors (see below), whose sum is σ = 36576000. Its totient is φ = 12512640.

The previous prime is 22708979. The next prime is 22709003. The reversal of 22709001 is 10090722.

It is a happy number.

It is not a de Polignac number, because 22709001 - 2⁵ = 22708969 is a prime.

It is a super-3 number, since 3×22709001³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22709003) 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, 29461 + ... + 30221.

It is an arithmetic number, because the mean of its divisors is an integer number (1143000).

Almost surely, 2^22709001 is an apocalyptic number.

22709001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22709001 is a deficient number, since it is larger than the sum of its proper divisors (13866999).

22709001 is an equidigital number, since it uses as much as digits as its factorization.

22709001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 22709001 is about 4765.3962059833. The cubic root of 22709001 is about 283.1822380853.

Adding to 22709001 its reverse (10090722), we get a palindrome (32799723).

The spelling of 22709001 in words is "twenty-two million, seven hundred nine thousand, one".