51434217 has 8 divisors (see below), whose sum is σ = 76198880. Its totient is φ = 34289460.

The previous prime is 51434209. The next prime is 51434237. The reversal of 51434217 is 71243415.

It is not a de Polignac number, because 51434217 - 2³ = 51434209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1904971 = 51434217 / (5 + 1 + 4 + 3 + 4 + 2 + 1 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51434237) 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, 952459 + ... + 952512.

It is an arithmetic number, because the mean of its divisors is an integer number (9524860).

Almost surely, 2^51434217 is an apocalyptic number.

It is an amenable number.

51434217 is a deficient number, since it is larger than the sum of its proper divisors (24764663).

51434217 is a wasteful number, since it uses less digits than its factorization.

51434217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904980 (or 1904974 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51434217 is about 7171.7652638664. The cubic root of 51434217 is about 371.8924637139.

The spelling of 51434217 in words is "fifty-one million, four hundred thirty-four thousand, two hundred seventeen".