51336113551 has 4 divisors (see below), whose sum is σ = 53568118512. Its totient is φ = 49104108592.

The previous prime is 51336113539. The next prime is 51336113561. The reversal of 51336113551 is 15531163315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15531163315 = 5 ⋅3106232663.

It is a cyclic number.

It is not a de Polignac number, because 51336113551 - 2²¹ = 51334016399 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 (51336113561) 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, 1116002446 + ... + 1116002491.

It is an arithmetic number, because the mean of its divisors is an integer number (13392029628).

Almost surely, 2^51336113551 is an apocalyptic number.

51336113551 is a deficient number, since it is larger than the sum of its proper divisors (2232004961).

51336113551 is a wasteful number, since it uses less digits than its factorization.

51336113551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232004960.

The product of its digits is 20250, while the sum is 34.

Adding to 51336113551 its reverse (15531163315), we get a palindrome (66867276866).

The spelling of 51336113551 in words is "fifty-one billion, three hundred thirty-six million, one hundred thirteen thousand, five hundred fifty-one".