51085007 has 4 divisors (see below), whose sum is σ = 51179976. Its totient is φ = 50990040.

The previous prime is 51085003. The next prime is 51085009. The reversal of 51085007 is 70058015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70058015 = 5 ⋅14011603.

It is a cyclic number.

It is not a de Polignac number, because 51085007 - 2² = 51085003 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 (51085003) 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 3 ways as a sum of consecutive naturals, for example, 46673 + ... + 47754.

It is an arithmetic number, because the mean of its divisors is an integer number (12794994).

Almost surely, 2^51085007 is an apocalyptic number.

51085007 is a deficient number, since it is larger than the sum of its proper divisors (94969).

51085007 is an equidigital number, since it uses as much as digits as its factorization.

51085007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94968.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 51085007 is about 7147.3776309917. The cubic root of 51085007 is about 371.0489033987.

The spelling of 51085007 in words is "fifty-one million, eighty-five thousand, seven".