51202125551 has 4 divisors (see below), whose sum is σ = 51282004704. Its totient is φ = 51122246400.

The previous prime is 51202125503. The next prime is 51202125553. The reversal of 51202125551 is 15552120215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15552120215 = 5 ⋅3110424043.

It is a cyclic number.

It is not a de Polignac number, because 51202125551 - 2¹⁰ = 51202124527 is a prime.

It is a super-3 number, since 3×51202125551³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51202125553) 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, 39938615 + ... + 39939896.

It is an arithmetic number, because the mean of its divisors is an integer number (12820501176).

Almost surely, 2^51202125551 is an apocalyptic number.

51202125551 is a deficient number, since it is larger than the sum of its proper divisors (79879153).

51202125551 is an equidigital number, since it uses as much as digits as its factorization.

51202125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79879152.

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 51202125551 its reverse (15552120215), we get a palindrome (66754245766).

The spelling of 51202125551 in words is "fifty-one billion, two hundred two million, one hundred twenty-five thousand, five hundred fifty-one".