51450785 has 8 divisors (see below), whose sum is σ = 63870120. Its totient is φ = 39741184.

The previous prime is 51450781. The next prime is 51450797. The reversal of 51450785 is 58705415.

It can be written as a sum of positive squares in 4 ways, for example, as 10784656 + 40666129 = 3284^2 + 6377^2 .

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 51450785 - 2² = 51450781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51450781) 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, 177272 + ... + 177561.

It is an arithmetic number, because the mean of its divisors is an integer number (7983765).

Almost surely, 2^51450785 is an apocalyptic number.

It is an amenable number.

51450785 is a deficient number, since it is larger than the sum of its proper divisors (12419335).

51450785 is a wasteful number, since it uses less digits than its factorization.

51450785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354867.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 51450785 is about 7172.9202560742. The cubic root of 51450785 is about 371.9323907847.

The spelling of 51450785 in words is "fifty-one million, four hundred fifty thousand, seven hundred eighty-five".