251231403212230 has 32 divisors (see below), whose sum is σ = 516839977039680. Its totient is φ = 86132966029440.

The previous prime is 251231403212203. The next prime is 251231403212239. The reversal of 251231403212230 is 32212304132152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251231403212192 and 251231403212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251231403212239) 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, 71502781 + ... + 74934040.

It is an arithmetic number, because the mean of its divisors is an integer number (16151249282490).

Almost surely, 2^{251231403212230} is an apocalyptic number.

251231403212230 is an abundant number, since it is smaller than the sum of its proper divisors (265608573827450).

251231403212230 is a wasteful number, since it uses less digits than its factorization.

251231403212230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146461344.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 251231403212230 its reverse (32212304132152), we get a palindrome (283443707344382).

The spelling of 251231403212230 in words is "two hundred fifty-one trillion, two hundred thirty-one billion, four hundred three million, two hundred twelve thousand, two hundred thirty".