51128479 has 8 divisors (see below), whose sum is σ = 53408160. Its totient is φ = 48883296.

The previous prime is 51128461. The next prime is 51128501. The reversal of 51128479 is 97482115.

51128479 is nontrivially palindromic in base 3.

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 51128479 - 2⁵ = 51128447 is a prime.

It is a super-2 number, since 2×51128479² = 5228242729706882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51128179) 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, 5572 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (6676020).

Almost surely, 2^51128479 is an apocalyptic number.

51128479 is a deficient number, since it is larger than the sum of its proper divisors (2279681).

51128479 is a wasteful number, since it uses less digits than its factorization.

51128479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17249.

The product of its digits is 20160, while the sum is 37.

The square root of 51128479 is about 7150.4180996638. The cubic root of 51128479 is about 371.1541245165.

The spelling of 51128479 in words is "fifty-one million, one hundred twenty-eight thousand, four hundred seventy-nine".