51333113 has 4 divisors (see below), whose sum is σ = 55281828. Its totient is φ = 47384400.

The previous prime is 51333109. The next prime is 51333119. The reversal of 51333113 is 31133315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31133315 = 5 ⋅6226663.

It can be written as a sum of positive squares in 2 ways, for example, as 4108729 + 47224384 = 2027^2 + 6872^2 .

It is a cyclic number.

It is not a de Polignac number, because 51333113 - 2² = 51333109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51333119) 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, 1974338 + ... + 1974363.

It is an arithmetic number, because the mean of its divisors is an integer number (13820457).

Almost surely, 2^51333113 is an apocalyptic number.

It is an amenable number.

51333113 is a deficient number, since it is larger than the sum of its proper divisors (3948715).

51333113 is a wasteful number, since it uses less digits than its factorization.

51333113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948714.

The product of its digits is 405, while the sum is 20.

The square root of 51333113 is about 7164.7130438001. The cubic root of 51333113 is about 371.6486281159.

Adding to 51333113 its reverse (31133315), we get a palindrome (82466428).

The spelling of 51333113 in words is "fifty-one million, three hundred thirty-three thousand, one hundred thirteen".