51055663 has 4 divisors (see below), whose sum is σ = 52243048. Its totient is φ = 49868280.

The previous prime is 51055657. The next prime is 51055681. The reversal of 51055663 is 36655015.

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

It is a cyclic number.

It is not a de Polignac number, because 51055663 - 2¹⁷ = 50924591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51055643) 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, 593628 + ... + 593713.

It is an arithmetic number, because the mean of its divisors is an integer number (13060762).

Almost surely, 2^51055663 is an apocalyptic number.

51055663 is a deficient number, since it is larger than the sum of its proper divisors (1187385).

51055663 is a wasteful number, since it uses less digits than its factorization.

51055663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187384.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 51055663 is about 7145.3245552599. The cubic root of 51055663 is about 370.9778444254.

The spelling of 51055663 in words is "fifty-one million, fifty-five thousand, six hundred sixty-three".