25222317515 has 8 divisors (see below), whose sum is σ = 30762958128. Its totient is φ = 19847069280.

The previous prime is 25222317503. The next prime is 25222317517. The reversal of 25222317515 is 51571322252.

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

It is not a de Polignac number, because 25222317515 - 2⁸ = 25222317259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25222317517) 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, 41347757 + ... + 41348366.

It is an arithmetic number, because the mean of its divisors is an integer number (3845369766).

Almost surely, 2^25222317515 is an apocalyptic number.

25222317515 is a deficient number, since it is larger than the sum of its proper divisors (5540640613).

25222317515 is an equidigital number, since it uses as much as digits as its factorization.

25222317515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82696189.

The product of its digits is 42000, while the sum is 35.

Adding to 25222317515 its reverse (51571322252), we get a palindrome (76793639767).

The spelling of 25222317515 in words is "twenty-five billion, two hundred twenty-two million, three hundred seventeen thousand, five hundred fifteen".