51436465 has 4 divisors (see below), whose sum is σ = 61723764. Its totient is φ = 41149168.

The previous prime is 51436433. The next prime is 51436493. The reversal of 51436465 is 56463415.

51436465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56463415 = 5 ⋅11292683.

It can be written as a sum of positive squares in 2 ways, for example, as 20866624 + 30569841 = 4568^2 + 5529^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436465 - 2⁵ = 51436433 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 51436465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5143642 + ... + 5143651.

It is an arithmetic number, because the mean of its divisors is an integer number (15430941).

Almost surely, 2^51436465 is an apocalyptic number.

It is an amenable number.

51436465 is a deficient number, since it is larger than the sum of its proper divisors (10287299).

51436465 is a wasteful number, since it uses less digits than its factorization.

51436465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10287298.

The product of its digits is 43200, while the sum is 34.

The square root of 51436465 is about 7171.9219878635. The cubic root of 51436465 is about 371.8978816512.

The spelling of 51436465 in words is "fifty-one million, four hundred thirty-six thousand, four hundred sixty-five".