251225020012 has 24 divisors (see below), whose sum is σ = 441459712512. Its totient is φ = 125094411600.

The previous prime is 251225020009. The next prime is 251225020037. The reversal of 251225020012 is 210020522152.

It is a super-2 number, since 2×251225020012² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1280587 + ... + 1463677.

It is an arithmetic number, because the mean of its divisors is an integer number (18394154688).

Almost surely, 2^251225020012 is an apocalyptic number.

It is an amenable number.

251225020012 is a deficient number, since it is larger than the sum of its proper divisors (190234692500).

251225020012 is a wasteful number, since it uses less digits than its factorization.

251225020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184509 (or 184507 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 251225020012 its reverse (210020522152), we get a palindrome (461245542164).

The spelling of 251225020012 in words is "two hundred fifty-one billion, two hundred twenty-five million, twenty thousand, twelve".