51164855 has 8 divisors (see below), whose sum is σ = 70168992. Its totient is φ = 35084448.

The previous prime is 51164851. The next prime is 51164863. The reversal of 51164855 is 55846115.

It is a happy number.

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

It is not a de Polignac number, because 51164855 - 2² = 51164851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1461853 = 51164855 / (5 + 1 + 1 + 6 + 4 + 8 + 5 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51164851) 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, 730892 + ... + 730961.

It is an arithmetic number, because the mean of its divisors is an integer number (8771124).

Almost surely, 2^51164855 is an apocalyptic number.

51164855 is a deficient number, since it is larger than the sum of its proper divisors (19004137).

51164855 is a wasteful number, since it uses less digits than its factorization.

51164855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461865.

The product of its digits is 24000, while the sum is 35.

The square root of 51164855 is about 7152.9612748847. The cubic root of 51164855 is about 371.2421244083.

The spelling of 51164855 in words is "fifty-one million, one hundred sixty-four thousand, eight hundred fifty-five".