25221106 has 4 divisors (see below), whose sum is σ = 37831662. Its totient is φ = 12610552.

The previous prime is 25221103. The next prime is 25221137. The reversal of 25221106 is 60112252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24850225 + 370881 = 4985^2 + 609^2 .

It is a super-2 number, since 2×25221106² = 1272208375726472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25221103) 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 as a sum of consecutive naturals, namely, 6305275 + ... + 6305278.

Almost surely, 2^25221106 is an apocalyptic number.

25221106 is a deficient number, since it is larger than the sum of its proper divisors (12610556).

25221106 is a wasteful number, since it uses less digits than its factorization.

25221106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12610555.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 25221106 is about 5022.0619271371. The cubic root of 25221106 is about 293.2612687410.

Adding to 25221106 its reverse (60112252), we get a palindrome (85333358).

The spelling of 25221106 in words is "twenty-five million, two hundred twenty-one thousand, one hundred six".