25221097 has 8 divisors (see below), whose sum is σ = 28463040. Its totient is φ = 22137360.

The previous prime is 25221071. The next prime is 25221103. The reversal of 25221097 is 79012252.

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 25221097 - 2¹¹ = 25219049 is a prime.

It is a super-2 number, since 2×25221097² = 1272207467766818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25221397) 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 7 ways as a sum of consecutive naturals, for example, 39213 + ... + 39850.

It is an arithmetic number, because the mean of its divisors is an integer number (3557880).

Almost surely, 2^25221097 is an apocalyptic number.

It is an amenable number.

25221097 is a deficient number, since it is larger than the sum of its proper divisors (3241943).

25221097 is a wasteful number, since it uses less digits than its factorization.

25221097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79103.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25221097 is about 5022.0610310907. The cubic root of 25221097 is about 293.2612338581.

It can be divided in two parts, 25 and 221097, that added together give a palindrome (221122).

The spelling of 25221097 in words is "twenty-five million, two hundred twenty-one thousand, ninety-seven".