55872099 has 10 divisors (see below), whose sum is σ = 83463380. Its totient is φ = 37248012.

The previous prime is 55872079. The next prime is 55872121. The reversal of 55872099 is 99027855.

It is a happy number.

55872099 is a `hidden beast` number, since 558 + 7 + 2 + 0 + 99 = 666.

It is not a de Polignac number, because 55872099 - 2²¹ = 53774947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55872079) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 344809 + ... + 344970.

It is an arithmetic number, because the mean of its divisors is an integer number (8346338).

Almost surely, 2^55872099 is an apocalyptic number.

55872099 is a deficient number, since it is larger than the sum of its proper divisors (27591281).

55872099 is an equidigital number, since it uses as much as digits as its factorization.

55872099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689791 (or 689782 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 55872099 is about 7474.7641434362. The cubic root of 55872099 is about 382.2947457024.

The spelling of 55872099 in words is "fifty-five million, eight hundred seventy-two thousand, ninety-nine".