251225422516 has 24 divisors (see below), whose sum is σ = 459220245120. Its totient is φ = 120103744992.

The previous prime is 251225422501. The next prime is 251225422577. The reversal of 251225422516 is 615224522152.

It is a super-2 number, since 2×251225422516² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10501336 + ... + 10525231.

It is an arithmetic number, because the mean of its divisors is an integer number (19134176880).

Almost surely, 2^251225422516 is an apocalyptic number.

It is an amenable number.

251225422516 is a deficient number, since it is larger than the sum of its proper divisors (207994822604).

251225422516 is a wasteful number, since it uses less digits than its factorization.

251225422516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21026703 (or 21026701 counting only the distinct ones).

The product of its digits is 96000, while the sum is 37.

Adding to 251225422516 its reverse (615224522152), we get a palindrome (866449944668).

The spelling of 251225422516 in words is "two hundred fifty-one billion, two hundred twenty-five million, four hundred twenty-two thousand, five hundred sixteen".