55197685 has 8 divisors (see below), whose sum is σ = 67853016. Its totient is φ = 43080960.

The previous prime is 55197671. The next prime is 55197697. The reversal of 55197685 is 58679155.

It can be written as a sum of positive squares in 4 ways, for example, as 4986289 + 50211396 = 2233^2 + 7086^2 .

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

It is not a de Polignac number, because 55197685 - 2⁷ = 55197557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134424 + ... + 134833.

It is an arithmetic number, because the mean of its divisors is an integer number (8481627).

Almost surely, 2^55197685 is an apocalyptic number.

It is an amenable number.

55197685 is a deficient number, since it is larger than the sum of its proper divisors (12655331).

55197685 is a wasteful number, since it uses less digits than its factorization.

55197685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269303.

The product of its digits is 378000, while the sum is 46.

The square root of 55197685 is about 7429.5144525063. The cubic root of 55197685 is about 380.7503295566.

The spelling of 55197685 in words is "fifty-five million, one hundred ninety-seven thousand, six hundred eighty-five".