25221319 has 12 divisors (see below), whose sum is σ = 26988984. Its totient is φ = 23563904.

The previous prime is 25221307. The next prime is 25221323. The reversal of 25221319 is 91312252.

It is a happy number.

It is not a de Polignac number, because 25221319 - 2¹³ = 25213127 is a prime.

It is a super-2 number, since 2×25221319² = 1272229864199522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25221293 and 25221302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25221389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56712 + ... + 57154.

It is an arithmetic number, because the mean of its divisors is an integer number (2249082).

Almost surely, 2^25221319 is an apocalyptic number.

25221319 is a deficient number, since it is larger than the sum of its proper divisors (1767665).

25221319 is a wasteful number, since it uses less digits than its factorization.

25221319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 657 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 25221319 is about 5022.0831335214. The cubic root of 25221319 is about 293.2620942992.

The spelling of 25221319 in words is "twenty-five million, two hundred twenty-one thousand, three hundred nineteen".