51525533 has 4 divisors (see below), whose sum is σ = 51611868. Its totient is φ = 51439200.

The previous prime is 51525443. The next prime is 51525557. The reversal of 51525533 is 33552515.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43533604 + 7991929 = 6598^2 + 2827^2 .

It is a cyclic number.

It is not a de Polignac number, because 51525533 - 2¹⁰ = 51524509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51525496 and 51525505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525433) 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, 42266 + ... + 43467.

It is an arithmetic number, because the mean of its divisors is an integer number (12902967).

Almost surely, 2^51525533 is an apocalyptic number.

It is an amenable number.

51525533 is a deficient number, since it is larger than the sum of its proper divisors (86335).

51525533 is an equidigital number, since it uses as much as digits as its factorization.

51525533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86334.

The product of its digits is 11250, while the sum is 29.

The square root of 51525533 is about 7178.1287951666. The cubic root of 51525533 is about 372.1124188119.

The spelling of 51525533 in words is "fifty-one million, five hundred twenty-five thousand, five hundred thirty-three".