251231403212204 has 48 divisors (see below), whose sum is σ = 465959370381120. Its totient is φ = 118114232156160.

The previous prime is 251231403212203. The next prime is 251231403212239. The reversal of 251231403212204 is 402212304132152.

It is not an unprimeable number, because it can be changed into a prime (251231403212203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471603404 + ... + 472135820.

It is an arithmetic number, because the mean of its divisors is an integer number (9707486882940).

Almost surely, 2^{251231403212204} is an apocalyptic number.

It is an amenable number.

251231403212204 is a deficient number, since it is larger than the sum of its proper divisors (214727967168916).

251231403212204 is a wasteful number, since it uses less digits than its factorization.

251231403212204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539018 (or 539016 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 251231403212204 its reverse (402212304132152), we get a palindrome (653443707344356).

The spelling of 251231403212204 in words is "two hundred fifty-one trillion, two hundred thirty-one billion, four hundred three million, two hundred twelve thousand, two hundred four".