55185385 has 16 divisors (see below), whose sum is σ = 68180112. Its totient is φ = 42854400.

The previous prime is 55185359. The next prime is 55185397. The reversal of 55185385 is 58358155.

It can be written as a sum of positive squares in 8 ways, for example, as 13039321 + 42146064 = 3611^2 + 6492^2 .

It is not a de Polignac number, because 55185385 - 2¹³ = 55177193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48847 + ... + 49963.

It is an arithmetic number, because the mean of its divisors is an integer number (4261257).

Almost surely, 2^55185385 is an apocalyptic number.

It is an amenable number.

55185385 is a deficient number, since it is larger than the sum of its proper divisors (12994727).

55185385 is a wasteful number, since it uses less digits than its factorization.

55185385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404.

The product of its digits is 120000, while the sum is 40.

The square root of 55185385 is about 7428.6866268540. The cubic root of 55185385 is about 380.7220459008.

The spelling of 55185385 in words is "fifty-five million, one hundred eighty-five thousand, three hundred eighty-five".