51490559 has 4 divisors (see below), whose sum is σ = 51806616. Its totient is φ = 51174504.

The previous prime is 51490531. The next prime is 51490577. The reversal of 51490559 is 95509415.

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 51490559 - 2²⁰ = 50441983 is a prime.

It is a super-2 number, since 2×51490559² = 5302555332264962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51490519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157784 + ... + 158109.

It is an arithmetic number, because the mean of its divisors is an integer number (12951654).

Almost surely, 2^51490559 is an apocalyptic number.

51490559 is a deficient number, since it is larger than the sum of its proper divisors (316057).

51490559 is a wasteful number, since it uses less digits than its factorization.

51490559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316056.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 51490559 is about 7175.6922314157. The cubic root of 51490559 is about 372.0282068063.

The spelling of 51490559 in words is "fifty-one million, four hundred ninety thousand, five hundred fifty-nine".