51309355 has 8 divisors (see below), whose sum is σ = 62313552. Its totient is φ = 40552608.

The previous prime is 51309341. The next prime is 51309359. The reversal of 51309355 is 55390315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51309355 - 2⁷ = 51309227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51309359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61404 + ... + 62233.

It is an arithmetic number, because the mean of its divisors is an integer number (7789194).

Almost surely, 2^51309355 is an apocalyptic number.

51309355 is a deficient number, since it is larger than the sum of its proper divisors (11004197).

51309355 is a wasteful number, since it uses less digits than its factorization.

51309355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123725.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 51309355 is about 7163.0548650698. The cubic root of 51309355 is about 371.5912837747.

The spelling of 51309355 in words is "fifty-one million, three hundred nine thousand, three hundred fifty-five".