55158905 has 8 divisors (see below), whose sum is σ = 66798600. Its totient is φ = 43721856.

The previous prime is 55158893. The next prime is 55158911. The reversal of 55158905 is 50985155.

55158905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3936256 + 51222649 = 1984^2 + 7157^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55158905 - 2¹⁰ = 55157881 is a prime.

It is an unprimeable number.

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, 50060 + ... + 51149.

It is an arithmetic number, because the mean of its divisors is an integer number (8349825).

Almost surely, 2^55158905 is an apocalyptic number.

It is an amenable number.

55158905 is a deficient number, since it is larger than the sum of its proper divisors (11639695).

55158905 is a wasteful number, since it uses less digits than its factorization.

55158905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101323.

The product of its (nonzero) digits is 45000, while the sum is 38.

The square root of 55158905 is about 7426.9041329480. The cubic root of 55158905 is about 380.6611412930.

The spelling of 55158905 in words is "fifty-five million, one hundred fifty-eight thousand, nine hundred five".