51355133 has 4 divisors (see below), whose sum is σ = 51397500. Its totient is φ = 51312768.

The previous prime is 51355097. The next prime is 51355151. The reversal of 51355133 is 33155315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33155315 = 5 ⋅6631063.

It can be written as a sum of positive squares in 2 ways, for example, as 28334329 + 23020804 = 5323^2 + 4798^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355133 - 2⁶ = 51355069 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 (51355153) 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, 19310 + ... + 21807.

It is an arithmetic number, because the mean of its divisors is an integer number (12849375).

Almost surely, 2^51355133 is an apocalyptic number.

It is an amenable number.

51355133 is a deficient number, since it is larger than the sum of its proper divisors (42367).

51355133 is a wasteful number, since it uses less digits than its factorization.

51355133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42366.

The product of its digits is 3375, while the sum is 26.

The square root of 51355133 is about 7166.2495770103. The cubic root of 51355133 is about 371.7017616745.

The spelling of 51355133 in words is "fifty-one million, three hundred fifty-five thousand, one hundred thirty-three".