51585901 has 4 divisors (see below), whose sum is σ = 51609852. Its totient is φ = 51561952.

The previous prime is 51585899. The next prime is 51585917. The reversal of 51585901 is 10958515.

51585901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10958515 = 5 ⋅2191703.

It can be written as a sum of positive squares in 2 ways, for example, as 2725801 + 48860100 = 1651^2 + 6990^2 .

It is a cyclic number.

It is not a de Polignac number, because 51585901 - 2¹ = 51585899 is a prime.

It is a super-2 number, since 2×51585901² = 5322210363963602, 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 (51585991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8386 + ... + 13171.

It is an arithmetic number, because the mean of its divisors is an integer number (12902463).

Almost surely, 2^51585901 is an apocalyptic number.

It is an amenable number.

51585901 is a deficient number, since it is larger than the sum of its proper divisors (23951).

51585901 is a wasteful number, since it uses less digits than its factorization.

51585901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23950.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 51585901 is about 7182.3325598304. The cubic root of 51585901 is about 372.2576860479.

The spelling of 51585901 in words is "fifty-one million, five hundred eighty-five thousand, nine hundred one".