50451865 has 4 divisors (see below), whose sum is σ = 60542244. Its totient is φ = 40361488.

The previous prime is 50451839. The next prime is 50451881. The reversal of 50451865 is 56815405.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31685641 + 18766224 = 5629^2 + 4332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50451865 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50451865.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045182 + ... + 5045191.

It is an arithmetic number, because the mean of its divisors is an integer number (15135561).

Almost surely, 2^50451865 is an apocalyptic number.

It is an amenable number.

50451865 is a deficient number, since it is larger than the sum of its proper divisors (10090379).

50451865 is a wasteful number, since it uses less digits than its factorization.

50451865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090378.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 50451865 is about 7102.9476275698. The cubic root of 50451865 is about 369.5096133093.

The spelling of 50451865 in words is "fifty million, four hundred fifty-one thousand, eight hundred sixty-five".