251023143212 has 24 divisors (see below), whose sum is σ = 451973353104. Its totient is φ = 121900082112.

The previous prime is 251023143143. The next prime is 251023143221. The reversal of 251023143212 is 212341320152.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1440098 + ... + 1604969.

It is an arithmetic number, because the mean of its divisors is an integer number (18832223046).

Almost surely, 2^251023143212 is an apocalyptic number.

It is an amenable number.

251023143212 is a deficient number, since it is larger than the sum of its proper divisors (200950209892).

251023143212 is a wasteful number, since it uses less digits than its factorization.

251023143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045665 (or 3045663 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 251023143212 its reverse (212341320152), we get a palindrome (463364463364).

The spelling of 251023143212 in words is "two hundred fifty-one billion, twenty-three million, one hundred forty-three thousand, two hundred twelve".