51586013 has 4 divisors (see below), whose sum is σ = 52559388. Its totient is φ = 50612640.

The previous prime is 51586009. The next prime is 51586027. The reversal of 51586013 is 31068515.

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 28334329 + 23251684 = 5323^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 51586013 - 2² = 51586009 is a prime.

It is a super-2 number, since 2×51586013² = 5322233474472338, 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 (51583013) 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, 486608 + ... + 486713.

It is an arithmetic number, because the mean of its divisors is an integer number (13139847).

Almost surely, 2^51586013 is an apocalyptic number.

51586013 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51586013 is a deficient number, since it is larger than the sum of its proper divisors (973375).

51586013 is an equidigital number, since it uses as much as digits as its factorization.

51586013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973374.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 51586013 is about 7182.3403567361. The cubic root of 51586013 is about 372.2579554550.

The spelling of 51586013 in words is "fifty-one million, five hundred eighty-six thousand, thirteen".