251141661233 has 4 divisors (see below), whose sum is σ = 252238349940. Its totient is φ = 250044972528.

The previous prime is 251141661229. The next prime is 251141661257. The reversal of 251141661233 is 332166141152.

251141661233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198477378064 + 52664283169 = 445508^2 + 229487^2 .

It is a cyclic number.

It is not a de Polignac number, because 251141661233 - 2² = 251141661229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251141661193 and 251141661202.

It is not an unprimeable number, because it can be changed into a prime (251141661223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548344010 + ... + 548344467.

It is an arithmetic number, because the mean of its divisors is an integer number (63059587485).

Almost surely, 2^251141661233 is an apocalyptic number.

It is an amenable number.

251141661233 is a deficient number, since it is larger than the sum of its proper divisors (1096688707).

251141661233 is a wasteful number, since it uses less digits than its factorization.

251141661233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096688706.

The product of its digits is 25920, while the sum is 35.

The spelling of 251141661233 in words is "two hundred fifty-one billion, one hundred forty-one million, six hundred sixty-one thousand, two hundred thirty-three".