51428945 has 8 divisors (see below), whose sum is σ = 62094336. Its totient is φ = 40890096.

The previous prime is 51428911. The next prime is 51428959. The reversal of 51428945 is 54982415.

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 51428945 - 2¹⁰ = 51427921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51428899 and 51428908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30737 + ... + 32366.

It is an arithmetic number, because the mean of its divisors is an integer number (7761792).

Almost surely, 2^51428945 is an apocalyptic number.

It is an amenable number.

51428945 is a deficient number, since it is larger than the sum of its proper divisors (10665391).

51428945 is a wasteful number, since it uses less digits than its factorization.

51428945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63271.

The product of its digits is 57600, while the sum is 38.

The square root of 51428945 is about 7171.3977019825. The cubic root of 51428945 is about 371.8797569714.

The spelling of 51428945 in words is "fifty-one million, four hundred twenty-eight thousand, nine hundred forty-five".