25222001 has 8 divisors (see below), whose sum is σ = 28874880. Its totient is φ = 21581568.

The previous prime is 25221997. The next prime is 25222013. The reversal of 25222001 is 10022252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25222001 - 2² = 25221997 is a prime.

It is a super-2 number, since 2×25222001² = 1272298668888002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25222031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (3609360).

Almost surely, 2^25222001 is an apocalyptic number.

It is an amenable number.

25222001 is a deficient number, since it is larger than the sum of its proper divisors (3652879).

25222001 is an equidigital number, since it uses as much as digits as its factorization.

25222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 25222001 is about 5022.1510331729. The cubic root of 25222001 is about 293.2647376046.

Adding to 25222001 its reverse (10022252), we get a palindrome (35244253).

The spelling of 25222001 in words is "twenty-five million, two hundred twenty-two thousand, one".