51436801 has 4 divisors (see below), whose sum is σ = 55393492. Its totient is φ = 47480112.

The previous prime is 51436799. The next prime is 51436813. The reversal of 51436801 is 10863415.

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 17808400 + 33628401 = 4220^2 + 5799^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436801 - 2¹ = 51436799 is a prime.

It is a super-2 number, since 2×51436801² = 5291488994227202, which contains 22 as substring.

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 51436801.

It is not an unprimeable number, because it can be changed into a prime (51436831) 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, 1978326 + ... + 1978351.

It is an arithmetic number, because the mean of its divisors is an integer number (13848373).

Almost surely, 2^51436801 is an apocalyptic number.

It is an amenable number.

51436801 is a deficient number, since it is larger than the sum of its proper divisors (3956691).

51436801 is a wasteful number, since it uses less digits than its factorization.

51436801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956690.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51436801 is about 7171.9454125084. The cubic root of 51436801 is about 371.8986914360.

The spelling of 51436801 in words is "fifty-one million, four hundred thirty-six thousand, eight hundred one".