51582491 has 8 divisors (see below), whose sum is σ = 54159360. Its totient is φ = 49033512.

The previous prime is 51582463. The next prime is 51582527. The reversal of 51582491 is 19428515.

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 51582491 - 2¹⁴ = 51566107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51582431) 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, 3131 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (6769920).

Almost surely, 2^51582491 is an apocalyptic number.

51582491 is a deficient number, since it is larger than the sum of its proper divisors (2576869).

51582491 is a wasteful number, since it uses less digits than its factorization.

51582491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13945.

The product of its digits is 14400, while the sum is 35.

The square root of 51582491 is about 7182.0951678462. The cubic root of 51582491 is about 372.2494833758.

The spelling of 51582491 in words is "fifty-one million, five hundred eighty-two thousand, four hundred ninety-one".