22249001 has 4 divisors (see below), whose sum is σ = 22722432. Its totient is φ = 21775572.

The previous prime is 22248997. The next prime is 22249009. The reversal of 22249001 is 10094222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10094222 = 2 ⋅5047111.

It is a cyclic number.

It is not a de Polignac number, because 22249001 - 2² = 22248997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22249009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236645 + ... + 236738.

It is an arithmetic number, because the mean of its divisors is an integer number (5680608).

Almost surely, 2^22249001 is an apocalyptic number.

It is an amenable number.

22249001 is a deficient number, since it is larger than the sum of its proper divisors (473431).

22249001 is an equidigital number, since it uses as much as digits as its factorization.

22249001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473430.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22249001 is about 4716.8846710514. The cubic root of 22249001 is about 281.2571069151.

The spelling of 22249001 in words is "twenty-two million, two hundred forty-nine thousand, one".