51525321 has 16 divisors (see below), whose sum is σ = 73194240. Its totient is φ = 32147280.

The previous prime is 51525319. The next prime is 51525377. The reversal of 51525321 is 12352515.

It is a happy number.

It is not a de Polignac number, because 51525321 - 2¹ = 51525319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51525291 and 51525300.

It is not an unprimeable number, because it can be changed into a prime (51525311) 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, 715 + ... + 10176.

It is an arithmetic number, because the mean of its divisors is an integer number (4574640).

Almost surely, 2^51525321 is an apocalyptic number.

It is an amenable number.

51525321 is a deficient number, since it is larger than the sum of its proper divisors (21668919).

51525321 is a wasteful number, since it uses less digits than its factorization.

51525321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10996.

The product of its digits is 1500, while the sum is 24.

The square root of 51525321 is about 7178.1140280717. The cubic root of 51525321 is about 372.1119084633. Note that the first 3 decimals are identical.

Adding to 51525321 its reverse (12352515), we get a palindrome (63877836).

The spelling of 51525321 in words is "fifty-one million, five hundred twenty-five thousand, three hundred twenty-one".