51295515 has 8 divisors (see below), whose sum is σ = 82072848. Its totient is φ = 27357600.

The previous prime is 51295513. The next prime is 51295523. The reversal of 51295515 is 51559215.

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

It is not a de Polignac number, because 51295515 - 2¹ = 51295513 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51295513) 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, 1709836 + ... + 1709865.

It is an arithmetic number, because the mean of its divisors is an integer number (10259106).

Almost surely, 2^51295515 is an apocalyptic number.

51295515 is a deficient number, since it is larger than the sum of its proper divisors (30777333).

51295515 is a wasteful number, since it uses less digits than its factorization.

51295515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419709.

The product of its digits is 11250, while the sum is 33.

The square root of 51295515 is about 7162.0887316481. The cubic root of 51295515 is about 371.5578702069.

The spelling of 51295515 in words is "fifty-one million, two hundred ninety-five thousand, five hundred fifteen".