55804197 has 16 divisors (see below), whose sum is σ = 79136960. Its totient is φ = 34877952.

The previous prime is 55804171. The next prime is 55804211. The reversal of 55804197 is 79140855.

It is not a de Polignac number, because 55804197 - 2⁷ = 55804069 is a prime.

It is a super-2 number, since 2×55804197² = 6228216805629618, 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 (55804117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483 + ... + 10575.

It is an arithmetic number, because the mean of its divisors is an integer number (4946060).

Almost surely, 2^55804197 is an apocalyptic number.

55804197 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55804197 is a deficient number, since it is larger than the sum of its proper divisors (23332763).

55804197 is a wasteful number, since it uses less digits than its factorization.

55804197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10212.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55804197 is about 7470.2206794713. The cubic root of 55804197 is about 382.1398138651.

The spelling of 55804197 in words is "fifty-five million, eight hundred four thousand, one hundred ninety-seven".