55121499 has 8 divisors (see below), whose sum is σ = 81661520. Its totient is φ = 36747648.

The previous prime is 55121483. The next prime is 55121519. The reversal of 55121499 is 99412155.

55121499 is a `hidden beast` number, since 551 + 2 + 14 + 99 = 666.

55121499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55121499 - 2⁴ = 55121483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55121419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020742 + ... + 1020795.

It is an arithmetic number, because the mean of its divisors is an integer number (10207690).

Almost surely, 2^55121499 is an apocalyptic number.

55121499 is a deficient number, since it is larger than the sum of its proper divisors (26540021).

55121499 is a wasteful number, since it uses less digits than its factorization.

55121499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041546 (or 2041540 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 55121499 is about 7424.3854291113. The cubic root of 55121499 is about 380.5750734097.

The spelling of 55121499 in words is "fifty-five million, one hundred twenty-one thousand, four hundred ninety-nine".