51335545 has 4 divisors (see below), whose sum is σ = 61602660. Its totient is φ = 41068432.

The previous prime is 51335533. The next prime is 51335551. The reversal of 51335545 is 54553315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54553315 = 5 ⋅10910663.

It can be written as a sum of positive squares in 2 ways, for example, as 20820969 + 30514576 = 4563^2 + 5524^2 .

It is a cyclic number.

It is not a de Polignac number, because 51335545 - 2¹⁵ = 51302777 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 5133550 + ... + 5133559.

It is an arithmetic number, because the mean of its divisors is an integer number (15400665).

Almost surely, 2^51335545 is an apocalyptic number.

It is an amenable number.

51335545 is a deficient number, since it is larger than the sum of its proper divisors (10267115).

51335545 is a wasteful number, since it uses less digits than its factorization.

51335545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267114.

The product of its digits is 22500, while the sum is 31.

The square root of 51335545 is about 7164.8827624742. The cubic root of 51335545 is about 371.6544972007.

The spelling of 51335545 in words is "fifty-one million, three hundred thirty-five thousand, five hundred forty-five".