25222451505 has 32 divisors (see below), whose sum is σ = 40525056000. Its totient is φ = 13395721920.

The previous prime is 25222451497. The next prime is 25222451519. The reversal of 25222451505 is 50515422252.

It is a happy number.

It is not a de Polignac number, because 25222451505 - 2³ = 25222451497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3671704 + ... + 3678566.

It is an arithmetic number, because the mean of its divisors is an integer number (1266408000).

Almost surely, 2^25222451505 is an apocalyptic number.

It is an amenable number.

25222451505 is a deficient number, since it is larger than the sum of its proper divisors (15302604495).

25222451505 is a wasteful number, since it uses less digits than its factorization.

25222451505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7861.

The product of its (nonzero) digits is 40000, while the sum is 33.

Adding to 25222451505 its reverse (50515422252), we get a palindrome (75737873757).

The spelling of 25222451505 in words is "twenty-five billion, two hundred twenty-two million, four hundred fifty-one thousand, five hundred five".