55170785 has 4 divisors (see below), whose sum is σ = 66204948. Its totient is φ = 44136624.

The previous prime is 55170757. The next prime is 55170823. The reversal of 55170785 is 58707155.

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 26697889 + 28472896 = 5167^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 55170785 - 2¹⁰ = 55169761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5517074 + ... + 5517083.

It is an arithmetic number, because the mean of its divisors is an integer number (16551237).

Almost surely, 2^55170785 is an apocalyptic number.

It is an amenable number.

55170785 is a deficient number, since it is larger than the sum of its proper divisors (11034163).

55170785 is a wasteful number, since it uses less digits than its factorization.

55170785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11034162.

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

The square root of 55170785 is about 7427.7038847816. The cubic root of 55170785 is about 380.6884679759.

It can be divided in two parts, 55170 and 785, that added together give a palindrome (55955).

The spelling of 55170785 in words is "fifty-five million, one hundred seventy thousand, seven hundred eighty-five".