51521527 has 4 divisors (see below), whose sum is σ = 52021840. Its totient is φ = 51021216.

The previous prime is 51521513. The next prime is 51521537. The reversal of 51521527 is 72512515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51521527 - 2⁷ = 51521399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51521495 and 51521504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51521507) 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, 250002 + ... + 250207.

It is an arithmetic number, because the mean of its divisors is an integer number (13005460).

Almost surely, 2^51521527 is an apocalyptic number.

51521527 is a deficient number, since it is larger than the sum of its proper divisors (500313).

51521527 is a wasteful number, since it uses less digits than its factorization.

51521527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500312.

The product of its digits is 3500, while the sum is 28.

The square root of 51521527 is about 7177.8497476612. The cubic root of 51521527 is about 372.1027749137.

The spelling of 51521527 in words is "fifty-one million, five hundred twenty-one thousand, five hundred twenty-seven".