51816055 has 8 divisors (see below), whose sum is σ = 62301744. Its totient is φ = 41371200.

The previous prime is 51816053. The next prime is 51816073. The reversal of 51816055 is 55061815.

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

It is not a de Polignac number, because 51816055 - 2¹ = 51816053 is a prime.

It is a super-3 number, since 3×51816055³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51816053) 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, 7341 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (7787718).

Almost surely, 2^51816055 is an apocalyptic number.

51816055 is a deficient number, since it is larger than the sum of its proper divisors (10485689).

51816055 is a wasteful number, since it uses less digits than its factorization.

51816055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20417.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 51816055 is about 7198.3369607153. The cubic root of 51816055 is about 372.8104823959.

It can be divided in two parts, 5181 and 6055, that added together give a square (11236 = 106²).

The spelling of 51816055 in words is "fifty-one million, eight hundred sixteen thousand, fifty-five".