251353245335133 has 4 divisors (see below), whose sum is σ = 335137660446848. Its totient is φ = 167568830223420.

The previous prime is 251353245335107. The next prime is 251353245335177. The reversal of 251353245335133 is 331533542353152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 251353245335133 - 2¹⁶ = 251353245269597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251353245333133) 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 3 ways as a sum of consecutive naturals, for example, 41892207555853 + ... + 41892207555858.

It is an arithmetic number, because the mean of its divisors is an integer number (83784415111712).

Almost surely, 2^{251353245335133} is an apocalyptic number.

It is an amenable number.

251353245335133 is a deficient number, since it is larger than the sum of its proper divisors (83784415111715).

251353245335133 is an equidigital number, since it uses as much as digits as its factorization.

251353245335133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83784415111714.

The product of its digits is 7290000, while the sum is 48.

Adding to 251353245335133 its reverse (331533542353152), we get a palindrome (582886787688285).

The spelling of 251353245335133 in words is "two hundred fifty-one trillion, three hundred fifty-three billion, two hundred forty-five million, three hundred thirty-five thousand, one hundred thirty-three".