51275219 has 8 divisors (see below), whose sum is σ = 53516160. Its totient is φ = 49065856.

The previous prime is 51275207. The next prime is 51275239. The reversal of 51275219 is 91257215.

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 a de Polignac number, because none of the positive numbers 2^k-51275219 is a prime.

It is a super-2 number, since 2×51275219² = 5258296166995922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51275239) 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, 4547 + ... + 11100.

It is an arithmetic number, because the mean of its divisors is an integer number (6689520).

Almost surely, 2^51275219 is an apocalyptic number.

51275219 is a deficient number, since it is larger than the sum of its proper divisors (2240941).

51275219 is a wasteful number, since it uses less digits than its factorization.

51275219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15789.

The product of its digits is 6300, while the sum is 32.

The square root of 51275219 is about 7160.6716863713. The cubic root of 51275219 is about 371.5088592076.

The spelling of 51275219 in words is "fifty-one million, two hundred seventy-five thousand, two hundred nineteen".