51325321 has 4 divisors (see below), whose sum is σ = 51902100. Its totient is φ = 50748544.

The previous prime is 51325303. The next prime is 51325343. The reversal of 51325321 is 12352315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12352315 = 5 ⋅2470463.

It can be written as a sum of positive squares in 2 ways, for example, as 6702921 + 44622400 = 2589^2 + 6680^2 .

It is a cyclic number.

It is not a de Polignac number, because 51325321 - 2¹³ = 51317129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51325292 and 51325301.

It is not an unprimeable number, because it can be changed into a prime (51325301) 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, 288256 + ... + 288433.

It is an arithmetic number, because the mean of its divisors is an integer number (12975525).

Almost surely, 2^51325321 is an apocalyptic number.

It is an amenable number.

51325321 is a deficient number, since it is larger than the sum of its proper divisors (576779).

51325321 is an equidigital number, since it uses as much as digits as its factorization.

51325321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576778.

The product of its digits is 900, while the sum is 22.

The square root of 51325321 is about 7164.1692470237. The cubic root of 51325321 is about 371.6298226284.

Adding to 51325321 its reverse (12352315), we get a palindrome (63677636).

The spelling of 51325321 in words is "fifty-one million, three hundred twenty-five thousand, three hundred twenty-one".