55173877 has 4 divisors (see below), whose sum is σ = 60189696. Its totient is φ = 50158060.

The previous prime is 55173871. The next prime is 55173889. The reversal of 55173877 is 77837155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55173877 - 2⁷ = 55173749 is a prime.

It is a super-2 number, since 2×55173877² = 6088313406422258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55173871) 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, 2507893 + ... + 2507914.

It is an arithmetic number, because the mean of its divisors is an integer number (15047424).

Almost surely, 2^55173877 is an apocalyptic number.

It is an amenable number.

55173877 is a deficient number, since it is larger than the sum of its proper divisors (5015819).

55173877 is a wasteful number, since it uses less digits than its factorization.

55173877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015818.

The product of its digits is 205800, while the sum is 43.

The square root of 55173877 is about 7427.9120215576. The cubic root of 55173877 is about 380.6955796309.

Subtracting 55173877 from its reverse (77837155), we obtain a triangular number (22663278 = T₆₇₃₂).

The spelling of 55173877 in words is "fifty-five million, one hundred seventy-three thousand, eight hundred seventy-seven".