51513037253 has 4 divisors (see below), whose sum is σ = 54224249760. Its totient is φ = 48801824748.

The previous prime is 51513037217. The next prime is 51513037379. The reversal of 51513037253 is 35273031515.

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 51513037253 - 2¹⁴ = 51513020869 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 (51513037453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355606225 + ... + 1355606262.

It is an arithmetic number, because the mean of its divisors is an integer number (13556062440).

Almost surely, 2^51513037253 is an apocalyptic number.

It is an amenable number.

51513037253 is a deficient number, since it is larger than the sum of its proper divisors (2711212507).

51513037253 is a wasteful number, since it uses less digits than its factorization.

51513037253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711212506.

The product of its (nonzero) digits is 47250, while the sum is 35.

Adding to 51513037253 its reverse (35273031515), we get a palindrome (86786068768).

The spelling of 51513037253 in words is "fifty-one billion, five hundred thirteen million, thirty-seven thousand, two hundred fifty-three".