51321100233 has 16 divisors (see below), whose sum is σ = 78026651136. Its totient is φ = 29724437760.

The previous prime is 51321100189. The next prime is 51321100319. The reversal of 51321100233 is 33200112315.

It is not a de Polignac number, because 51321100233 - 2¹⁶ = 51321034697 is a prime.

It is a super-3 number, since 3×51321100233³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51321100933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38703033 + ... + 38704358.

It is an arithmetic number, because the mean of its divisors is an integer number (4876665696).

Almost surely, 2^51321100233 is an apocalyptic number.

It is an amenable number.

51321100233 is a deficient number, since it is larger than the sum of its proper divisors (26705550903).

51321100233 is a wasteful number, since it uses less digits than its factorization.

51321100233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77407424.

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 51321100233 its reverse (33200112315), we get a palindrome (84521212548).

The spelling of 51321100233 in words is "fifty-one billion, three hundred twenty-one million, one hundred thousand, two hundred thirty-three".