51428913 has 8 divisors (see below), whose sum is σ = 68606208. Its totient is φ = 34268784.

The previous prime is 51428911. The next prime is 51428959. The reversal of 51428913 is 31982415.

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

It is not a de Polignac number, because 51428913 - 2¹ = 51428911 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 (51428911) 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, 6795 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (8575776).

Almost surely, 2^51428913 is an apocalyptic number.

It is an amenable number.

51428913 is a deficient number, since it is larger than the sum of its proper divisors (17177295).

51428913 is a wasteful number, since it uses less digits than its factorization.

51428913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8583.

The product of its digits is 8640, while the sum is 33.

The square root of 51428913 is about 7171.3954708969. The cubic root of 51428913 is about 371.8796798413.

The spelling of 51428913 in words is "fifty-one million, four hundred twenty-eight thousand, nine hundred thirteen".