51198085 has 4 divisors (see below), whose sum is σ = 61437708. Its totient is φ = 40958464.

The previous prime is 51198073. The next prime is 51198089. The reversal of 51198085 is 58089115.

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 36590401 + 14607684 = 6049^2 + 3822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51198085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51198089) 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, 5119804 + ... + 5119813.

It is an arithmetic number, because the mean of its divisors is an integer number (15359427).

Almost surely, 2^51198085 is an apocalyptic number.

It is an amenable number.

51198085 is a deficient number, since it is larger than the sum of its proper divisors (10239623).

51198085 is a wasteful number, since it uses less digits than its factorization.

51198085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10239622.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51198085 is about 7155.2837120550. The cubic root of 51198085 is about 371.3224771299.

It can be divided in two parts, 511 and 98085, that added together give a square (98596 = 314²).

The spelling of 51198085 in words is "fifty-one million, one hundred ninety-eight thousand, eighty-five".