51842581 has 8 divisors (see below), whose sum is σ = 59682240. Its totient is φ = 44111328.

The previous prime is 51842579. The next prime is 51842591. The reversal of 51842581 is 18524815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51842581 - 2¹ = 51842579 is a prime.

It is a super-2 number, since 2×51842581² = 5375306409483122, 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 (51842521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26071 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (7460280).

Almost surely, 2^51842581 is an apocalyptic number.

It is an amenable number.

51842581 is a deficient number, since it is larger than the sum of its proper divisors (7839659).

51842581 is a wasteful number, since it uses less digits than its factorization.

51842581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54203.

The product of its digits is 12800, while the sum is 34.

The square root of 51842581 is about 7200.1792338802. The cubic root of 51842581 is about 372.8740887037.

The spelling of 51842581 in words is "fifty-one million, eight hundred forty-two thousand, five hundred eighty-one".