51578427 has 8 divisors (see below), whose sum is σ = 68970816. Its totient is φ = 34285832.

The previous prime is 51578419. The next prime is 51578431. The reversal of 51578427 is 72487515.

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 51578427 - 2³ = 51578419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51578467) 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, 23733 + ... + 25814.

It is an arithmetic number, because the mean of its divisors is an integer number (8621352).

Almost surely, 2^51578427 is an apocalyptic number.

51578427 is a deficient number, since it is larger than the sum of its proper divisors (17392389).

51578427 is a wasteful number, since it uses less digits than its factorization.

51578427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49897.

The product of its digits is 78400, while the sum is 39.

The square root of 51578427 is about 7181.8122364763. The cubic root of 51578427 is about 372.2397070506.

The spelling of 51578427 in words is "fifty-one million, five hundred seventy-eight thousand, four hundred twenty-seven".