51321255 has 8 divisors (see below), whose sum is σ = 82114032. Its totient is φ = 27371328.

The previous prime is 51321253. The next prime is 51321287. The reversal of 51321255 is 55212315.

It is a happy number.

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

It is not a de Polignac number, because 51321255 - 2¹ = 51321253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321253) 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, 1710694 + ... + 1710723.

It is an arithmetic number, because the mean of its divisors is an integer number (10264254).

Almost surely, 2^51321255 is an apocalyptic number.

51321255 is a deficient number, since it is larger than the sum of its proper divisors (30792777).

51321255 is a wasteful number, since it uses less digits than its factorization.

51321255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421425.

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

The square root of 51321255 is about 7163.8854680962. The cubic root of 51321255 is about 371.6200088449.

The spelling of 51321255 in words is "fifty-one million, three hundred twenty-one thousand, two hundred fifty-five".