51025321 has 4 divisors (see below), whose sum is σ = 51724372. Its totient is φ = 50326272.

The previous prime is 51025319. The next prime is 51025333. The reversal of 51025321 is 12352015.

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 44368921 + 6656400 = 6661^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025321 - 2¹ = 51025319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51025021) 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, 349416 + ... + 349561.

It is an arithmetic number, because the mean of its divisors is an integer number (12931093).

Almost surely, 2^51025321 is an apocalyptic number.

It is an amenable number.

51025321 is a deficient number, since it is larger than the sum of its proper divisors (699051).

51025321 is an equidigital number, since it uses as much as digits as its factorization.

51025321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699050.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51025321 is about 7143.2010331503. The cubic root of 51025321 is about 370.9043400731.

Adding to 51025321 its reverse (12352015), we get a palindrome (63377336).

The spelling of 51025321 in words is "fifty-one million, twenty-five thousand, three hundred twenty-one".