51877505 has 24 divisors (see below), whose sum is σ = 67400424. Its totient is φ = 38304000.

The previous prime is 51877481. The next prime is 51877517. The reversal of 51877505 is 50577815.

It can be written as a sum of positive squares in 4 ways, for example, as 2989441 + 48888064 = 1729^2 + 6992^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51877505 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73655 + ... + 74355.

It is an arithmetic number, because the mean of its divisors is an integer number (2808351).

Almost surely, 2^51877505 is an apocalyptic number.

It is an amenable number.

51877505 is a deficient number, since it is larger than the sum of its proper divisors (15522919).

51877505 is a wasteful number, since it uses less digits than its factorization.

51877505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 51877505 is about 7202.6040429833. The cubic root of 51877505 is about 372.9577993739.

The spelling of 51877505 in words is "fifty-one million, eight hundred seventy-seven thousand, five hundred five".