51521063 has 4 divisors (see below), whose sum is σ = 56204808. Its totient is φ = 46837320.

The previous prime is 51521021. The next prime is 51521077. The reversal of 51521063 is 36012515.

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 51521063 - 2²⁴ = 34743847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51521263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341856 + ... + 2341877.

It is an arithmetic number, because the mean of its divisors is an integer number (14051202).

Almost surely, 2^51521063 is an apocalyptic number.

51521063 is a deficient number, since it is larger than the sum of its proper divisors (4683745).

51521063 is a wasteful number, since it uses less digits than its factorization.

51521063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683744.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 51521063 is about 7177.8174259311. The cubic root of 51521063 is about 372.1016578647.

Adding to 51521063 its reverse (36012515), we get a palindrome (87533578).

The spelling of 51521063 in words is "fifty-one million, five hundred twenty-one thousand, sixty-three".