51854555 has 4 divisors (see below), whose sum is σ = 62225472. Its totient is φ = 41483640.

The previous prime is 51854549. The next prime is 51854557. The reversal of 51854555 is 55545815.

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

It is not a de Polignac number, because 51854555 - 2¹⁰ = 51853531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51854557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5185451 + ... + 5185460.

It is an arithmetic number, because the mean of its divisors is an integer number (15556368).

Almost surely, 2^51854555 is an apocalyptic number.

51854555 is a deficient number, since it is larger than the sum of its proper divisors (10370917).

51854555 is a wasteful number, since it uses less digits than its factorization.

51854555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370916.

The product of its digits is 100000, while the sum is 38.

The square root of 51854555 is about 7201.0106929514. The cubic root of 51854555 is about 372.9027938758.

The spelling of 51854555 in words is "fifty-one million, eight hundred fifty-four thousand, five hundred fifty-five".