51582401 has 4 divisors (see below), whose sum is σ = 55550292. Its totient is φ = 47614512.

The previous prime is 51582383. The next prime is 51582407. The reversal of 51582401 is 10428515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10428515 = 5 ⋅2085703.

It can be written as a sum of positive squares in 2 ways, for example, as 19149376 + 32433025 = 4376^2 + 5695^2 .

It is a cyclic number.

It is not a de Polignac number, because 51582401 - 2⁶ = 51582337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51582407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1983926 + ... + 1983951.

It is an arithmetic number, because the mean of its divisors is an integer number (13887573).

Almost surely, 2^51582401 is an apocalyptic number.

It is an amenable number.

51582401 is a deficient number, since it is larger than the sum of its proper divisors (3967891).

51582401 is a wasteful number, since it uses less digits than its factorization.

51582401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967890.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 51582401 is about 7182.0889022623. The cubic root of 51582401 is about 372.2492668781.

The spelling of 51582401 in words is "fifty-one million, five hundred eighty-two thousand, four hundred one".