51251453550 has 72 divisors (see below), whose sum is σ = 150213365640. Its totient is φ = 12424593600.

The previous prime is 51251453509. The next prime is 51251453569. The reversal of 51251453550 is 5535415215.

51251453550 is a `hidden beast` number, since 5 + 1 + 2 + 51 + 4 + 53 + 550 = 666.

It is a super-2 number, since 2×51251453550² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5171965 + ... + 5181864.

It is an arithmetic number, because the mean of its divisors is an integer number (2086296745).

Almost surely, 2^51251453550 is an apocalyptic number.

51251453550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51251453550 is an abundant number, since it is smaller than the sum of its proper divisors (98961912090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51251453550 is a wasteful number, since it uses less digits than its factorization.

51251453550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10353858 (or 10353850 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

Adding to 51251453550 its reverse (5535415215), we get a palindrome (56786868765).

The spelling of 51251453550 in words is "fifty-one billion, two hundred fifty-one million, four hundred fifty-three thousand, five hundred fifty".