51489541 has 4 divisors (see below), whose sum is σ = 51539584. Its totient is φ = 51439500.

The previous prime is 51489539. The next prime is 51489623. The reversal of 51489541 is 14598415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51489541 - 2¹ = 51489539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51489541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51489041) 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, 23445 + ... + 25546.

It is an arithmetic number, because the mean of its divisors is an integer number (12884896).

Almost surely, 2^51489541 is an apocalyptic number.

It is an amenable number.

51489541 is a deficient number, since it is larger than the sum of its proper divisors (50043).

51489541 is a wasteful number, since it uses less digits than its factorization.

51489541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50042.

The product of its digits is 28800, while the sum is 37.

The square root of 51489541 is about 7175.6212971422. The cubic root of 51489541 is about 372.0257550481.

The spelling of 51489541 in words is "fifty-one million, four hundred eighty-nine thousand, five hundred forty-one".