55087877 has 4 divisors (see below), whose sum is σ = 59325420. Its totient is φ = 50850336.

The previous prime is 55087873. The next prime is 55087883. The reversal of 55087877 is 77878055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13498276 + 41589601 = 3674^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 55087877 - 2² = 55087873 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 (55087873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118752 + ... + 2118777.

It is an arithmetic number, because the mean of its divisors is an integer number (14831355).

Almost surely, 2^55087877 is an apocalyptic number.

It is an amenable number.

55087877 is a deficient number, since it is larger than the sum of its proper divisors (4237543).

55087877 is a wasteful number, since it uses less digits than its factorization.

55087877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237542.

The product of its (nonzero) digits is 548800, while the sum is 47.

The square root of 55087877 is about 7422.1207885617. The cubic root of 55087877 is about 380.4976789395.

The spelling of 55087877 in words is "fifty-five million, eighty-seven thousand, eight hundred seventy-seven".