51528551 has 16 divisors (see below), whose sum is σ = 55440000. Its totient is φ = 47752416.

The previous prime is 51528527. The next prime is 51528559. The reversal of 51528551 is 15582515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51528551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51528559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287780 + ... + 287958.

It is an arithmetic number, because the mean of its divisors is an integer number (3465000).

Almost surely, 2^51528551 is an apocalyptic number.

51528551 is a deficient number, since it is larger than the sum of its proper divisors (3911449).

51528551 is a wasteful number, since it uses less digits than its factorization.

51528551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its digits is 10000, while the sum is 32.

The square root of 51528551 is about 7178.3390140060. The cubic root of 51528551 is about 372.1196839048.

The spelling of 51528551 in words is "fifty-one million, five hundred twenty-eight thousand, five hundred fifty-one".