51158563 has 4 divisors (see below), whose sum is σ = 51190920. Its totient is φ = 51126208.

The previous prime is 51158561. The next prime is 51158573. The reversal of 51158563 is 36585115.

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 51158563 - 2¹ = 51158561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51158561) 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, 13678 + ... + 17011.

It is an arithmetic number, because the mean of its divisors is an integer number (12797730).

Almost surely, 2^51158563 is an apocalyptic number.

51158563 is a deficient number, since it is larger than the sum of its proper divisors (32357).

51158563 is a wasteful number, since it uses less digits than its factorization.

51158563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32356.

The product of its digits is 18000, while the sum is 34.

The square root of 51158563 is about 7152.5214435191. The cubic root of 51158563 is about 371.2269059463.

The spelling of 51158563 in words is "fifty-one million, one hundred fifty-eight thousand, five hundred sixty-three".