51445501 has 8 divisors (see below), whose sum is σ = 52923200. Its totient is φ = 49980672.

The previous prime is 51445487. The next prime is 51445517. The reversal of 51445501 is 10554415.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51445501 - 2²¹ = 49348349 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51445531) 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 7 ways as a sum of consecutive naturals, for example, 5200 + ... + 11398.

It is an arithmetic number, because the mean of its divisors is an integer number (6615400).

Almost surely, 2^51445501 is an apocalyptic number.

It is an amenable number.

51445501 is a deficient number, since it is larger than the sum of its proper divisors (1477699).

51445501 is a wasteful number, since it uses less digits than its factorization.

51445501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6435.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51445501 is about 7172.5519168564. The cubic root of 51445501 is about 371.9196578528.

Adding to 51445501 its reverse (10554415), we get a palindrome (61999916).

The spelling of 51445501 in words is "fifty-one million, four hundred forty-five thousand, five hundred one".