51253423551 has 12 divisors (see below), whose sum is σ = 80762970600. Its totient is φ = 31062680880.

The previous prime is 51253423549. The next prime is 51253423577. The reversal of 51253423551 is 15532435215.

51253423551 is a `hidden beast` number, since 5 + 12 + 53 + 42 + 3 + 551 = 666.

It is not a de Polignac number, because 51253423551 - 2¹ = 51253423549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253423511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258855576 + ... + 258855773.

It is an arithmetic number, because the mean of its divisors is an integer number (6730247550).

Almost surely, 2^51253423551 is an apocalyptic number.

51253423551 is a deficient number, since it is larger than the sum of its proper divisors (29509547049).

51253423551 is a wasteful number, since it uses less digits than its factorization.

51253423551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517711366 (or 517711363 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

Adding to 51253423551 its reverse (15532435215), we get a palindrome (66785858766).

The spelling of 51253423551 in words is "fifty-one billion, two hundred fifty-three million, four hundred twenty-three thousand, five hundred fifty-one".