55906155 has 12 divisors (see below), whose sum is σ = 96904080. Its totient is φ = 29816592.

The previous prime is 55906153. The next prime is 55906177. The reversal of 55906155 is 55160955.

55906155 is a `hidden beast` number, since 5 + 590 + 61 + 5 + 5 = 666.

It is not a de Polignac number, because 55906155 - 2¹ = 55906153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55906153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 621135 + ... + 621224.

It is an arithmetic number, because the mean of its divisors is an integer number (8075340).

Almost surely, 2^55906155 is an apocalyptic number.

55906155 is a deficient number, since it is larger than the sum of its proper divisors (40997925).

55906155 is a wasteful number, since it uses less digits than its factorization.

55906155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242370 (or 1242367 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 55906155 is about 7477.0418615921. The cubic root of 55906155 is about 382.3724039356.

The spelling of 55906155 in words is "fifty-five million, nine hundred six thousand, one hundred fifty-five".