51528501 has 16 divisors (see below), whose sum is σ = 76478400. Its totient is φ = 34289424.

The previous prime is 51528493. The next prime is 51528509. The reversal of 51528501 is 10582515.

51528501 is a `hidden beast` number, since 5 + 152 + 8 + 501 = 666.

It is an interprime number because it is at equal distance from previous prime (51528493) and next prime (51528509).

It is not a de Polignac number, because 51528501 - 2³ = 51528493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51528509) 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 15 ways as a sum of consecutive naturals, for example, 16870 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (4779900).

Almost surely, 2^51528501 is an apocalyptic number.

It is an amenable number.

51528501 is a deficient number, since it is larger than the sum of its proper divisors (24949899).

51528501 is a wasteful number, since it uses less digits than its factorization.

51528501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505 (or 3499 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 51528501 is about 7178.3355313053. The cubic root of 51528501 is about 372.1195635444.

The spelling of 51528501 in words is "fifty-one million, five hundred twenty-eight thousand, five hundred one".