51549017 has 4 divisors (see below), whose sum is σ = 55514340. Its totient is φ = 47583696.

The previous prime is 51549007. The next prime is 51549041. The reversal of 51549017 is 71094515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11909401 + 39639616 = 3451^2 + 6296^2 .

It is a cyclic number.

It is not a de Polignac number, because 51549017 - 2¹² = 51544921 is a prime.

It is a super-3 number, since 3×51549017³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51549007) 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, 1982642 + ... + 1982667.

It is an arithmetic number, because the mean of its divisors is an integer number (13878585).

Almost surely, 2^51549017 is an apocalyptic number.

It is an amenable number.

51549017 is a deficient number, since it is larger than the sum of its proper divisors (3965323).

51549017 is a wasteful number, since it uses less digits than its factorization.

51549017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965322.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 51549017 is about 7179.7644111767. The cubic root of 51549017 is about 372.1689432846.

The spelling of 51549017 in words is "fifty-one million, five hundred forty-nine thousand, seventeen".