51877565 has 8 divisors (see below), whose sum is σ = 63701088. Its totient is φ = 40536720.

The previous prime is 51877561. The next prime is 51877571. The reversal of 51877565 is 56577815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51877565 - 2² = 51877561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51877561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120431 + ... + 120860.

It is an arithmetic number, because the mean of its divisors is an integer number (7962636).

Almost surely, 2^51877565 is an apocalyptic number.

It is an amenable number.

51877565 is a deficient number, since it is larger than the sum of its proper divisors (11823523).

51877565 is a wasteful number, since it uses less digits than its factorization.

51877565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241339.

The product of its digits is 294000, while the sum is 44.

The square root of 51877565 is about 7202.6082081424. The cubic root of 51877565 is about 372.9579431578.

The spelling of 51877565 in words is "fifty-one million, eight hundred seventy-seven thousand, five hundred sixty-five".