51528541 has 4 divisors (see below), whose sum is σ = 53190784. Its totient is φ = 49866300.

The previous prime is 51528527. The next prime is 51528559. The reversal of 51528541 is 14582515.

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 51528541 - 2⁵ = 51528509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1662211 = 51528541 / (5 + 1 + 5 + 2 + 8 + 5 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51528511) 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, 831075 + ... + 831136.

It is an arithmetic number, because the mean of its divisors is an integer number (13297696).

Almost surely, 2^51528541 is an apocalyptic number.

It is an amenable number.

51528541 is a deficient number, since it is larger than the sum of its proper divisors (1662243).

51528541 is a wasteful number, since it uses less digits than its factorization.

51528541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662242.

The product of its digits is 8000, while the sum is 31.

The square root of 51528541 is about 7178.3383174660. The cubic root of 51528541 is about 372.1196598327.

The spelling of 51528541 in words is "fifty-one million, five hundred twenty-eight thousand, five hundred forty-one".