51130549 has 4 divisors (see below), whose sum is σ = 51262380. Its totient is φ = 50998720.

The previous prime is 51130537. The next prime is 51130571. The reversal of 51130549 is 94503115.

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 10400625 + 40729924 = 3225^2 + 6382^2 .

It is a cyclic number.

It is not a de Polignac number, because 51130549 - 2⁷ = 51130421 is a prime.

It is a super-2 number, since 2×51130549² = 5228666082082802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51130529) 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, 65332 + ... + 66109.

It is an arithmetic number, because the mean of its divisors is an integer number (12815595).

Almost surely, 2^51130549 is an apocalyptic number.

It is an amenable number.

51130549 is a deficient number, since it is larger than the sum of its proper divisors (131831).

51130549 is a wasteful number, since it uses less digits than its factorization.

51130549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131830.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 51130549 is about 7150.5628449794. The cubic root of 51130549 is about 371.1591333275.

The spelling of 51130549 in words is "fifty-one million, one hundred thirty thousand, five hundred forty-nine".