51877845 has 12 divisors (see below), whose sum is σ = 89921676. Its totient is φ = 27668160.

The previous prime is 51877843. The next prime is 51877853. The reversal of 51877845 is 54877815.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34187409 + 17690436 = 5847^2 + 4206^2 .

It is not a de Polignac number, because 51877845 - 2¹ = 51877843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1152841 = 51877845 / (5 + 1 + 8 + 7 + 7 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 51877845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51877841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576376 + ... + 576465.

It is an arithmetic number, because the mean of its divisors is an integer number (7493473).

Almost surely, 2^51877845 is an apocalyptic number.

It is an amenable number.

51877845 is a deficient number, since it is larger than the sum of its proper divisors (38043831).

51877845 is a wasteful number, since it uses less digits than its factorization.

51877845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152852 (or 1152849 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 51877845 is about 7202.6276455194. The cubic root of 51877845 is about 372.9586141482.

The spelling of 51877845 in words is "fifty-one million, eight hundred seventy-seven thousand, eight hundred forty-five".