51321451 has 8 divisors (see below), whose sum is σ = 54520400. Its totient is φ = 48172320.

The previous prime is 51321449. The next prime is 51321469. The reversal of 51321451 is 15412315.

It is a happy number.

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 51321451 - 2¹ = 51321449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51321401) 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, 10320 + ... + 14461.

It is an arithmetic number, because the mean of its divisors is an integer number (6815050).

Almost surely, 2^51321451 is an apocalyptic number.

51321451 is a deficient number, since it is larger than the sum of its proper divisors (3198949).

51321451 is a wasteful number, since it uses less digits than its factorization.

51321451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24909.

The product of its digits is 600, while the sum is 22.

The square root of 51321451 is about 7163.8991478105. The cubic root of 51321451 is about 371.6204819265.

Adding to 51321451 its reverse (15412315), we get a palindrome (66733766).

The spelling of 51321451 in words is "fifty-one million, three hundred twenty-one thousand, four hundred fifty-one".