51826865 has 4 divisors (see below), whose sum is σ = 62192244. Its totient is φ = 41461488.

The previous prime is 51826847. The next prime is 51826867. The reversal of 51826865 is 56862815.

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 16638241 + 35188624 = 4079^2 + 5932^2 .

It is a cyclic number.

It is not a de Polignac number, because 51826865 - 2¹⁰ = 51825841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51826867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5182682 + ... + 5182691.

It is an arithmetic number, because the mean of its divisors is an integer number (15548061).

Almost surely, 2^51826865 is an apocalyptic number.

It is an amenable number.

51826865 is a deficient number, since it is larger than the sum of its proper divisors (10365379).

51826865 is a wasteful number, since it uses less digits than its factorization.

51826865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365378.

The product of its digits is 115200, while the sum is 41.

The square root of 51826865 is about 7199.0877894355. The cubic root of 51826865 is about 372.8364061570.

The spelling of 51826865 in words is "fifty-one million, eight hundred twenty-six thousand, eight hundred sixty-five".