51325221 has 8 divisors (see below), whose sum is σ = 69593760. Its totient is φ = 33636752.

The previous prime is 51325201. The next prime is 51325223. The reversal of 51325221 is 12252315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51325221 - 2⁵ = 51325189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51325223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144810 + ... + 145163.

It is an arithmetic number, because the mean of its divisors is an integer number (8699220).

Almost surely, 2^51325221 is an apocalyptic number.

It is an amenable number.

51325221 is a deficient number, since it is larger than the sum of its proper divisors (18268539).

51325221 is a wasteful number, since it uses less digits than its factorization.

51325221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290035.

The product of its digits is 600, while the sum is 21.

The square root of 51325221 is about 7164.1622678440. The cubic root of 51325221 is about 371.6295812725.

Adding to 51325221 its reverse (12252315), we get a palindrome (63577536).

The spelling of 51325221 in words is "fifty-one million, three hundred twenty-five thousand, two hundred twenty-one".