51333605 has 4 divisors (see below), whose sum is σ = 61600332. Its totient is φ = 41066880.

The previous prime is 51333589. The next prime is 51333619. The reversal of 51333605 is 50633315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5541316 + 45792289 = 2354^2 + 6767^2 .

It is not a de Polignac number, because 51333605 - 2⁴ = 51333589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5133356 + ... + 5133365.

It is an arithmetic number, because the mean of its divisors is an integer number (15400083).

Almost surely, 2^51333605 is an apocalyptic number.

It is an amenable number.

51333605 is a deficient number, since it is larger than the sum of its proper divisors (10266727).

51333605 is a wasteful number, since it uses less digits than its factorization.

51333605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10266726.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 51333605 is about 7164.7473786589. The cubic root of 51333605 is about 371.6498154622.

The spelling of 51333605 in words is "fifty-one million, three hundred thirty-three thousand, six hundred five".