51820455 has 8 divisors (see below), whose sum is σ = 82912752. Its totient is φ = 27637568.

The previous prime is 51820441. The next prime is 51820459. The reversal of 51820455 is 55402815.

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 51820455 - 2¹⁰ = 51819431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51820459) 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, 1727334 + ... + 1727363.

It is an arithmetic number, because the mean of its divisors is an integer number (10364094).

Almost surely, 2^51820455 is an apocalyptic number.

51820455 is a deficient number, since it is larger than the sum of its proper divisors (31092297).

51820455 is a wasteful number, since it uses less digits than its factorization.

51820455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454705.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 51820455 is about 7198.6425803758. The cubic root of 51820455 is about 372.8210345931.

The spelling of 51820455 in words is "fifty-one million, eight hundred twenty thousand, four hundred fifty-five".