55532155 has 32 divisors (see below), whose sum is σ = 80985600. Its totient is φ = 35707392.

The previous prime is 55532137. The next prime is 55532159. The reversal of 55532155 is 55123555.

It is a happy number.

It is not a de Polignac number, because 55532155 - 2⁹ = 55531643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55532159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74776 + ... + 75514.

It is an arithmetic number, because the mean of its divisors is an integer number (2530800).

Almost surely, 2^55532155 is an apocalyptic number.

55532155 is a deficient number, since it is larger than the sum of its proper divisors (25453445).

55532155 is a wasteful number, since it uses less digits than its factorization.

55532155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883.

The product of its digits is 18750, while the sum is 31.

The square root of 55532155 is about 7451.9900026771. The cubic root of 55532155 is about 381.5178327623.

The spelling of 55532155 in words is "fifty-five million, five hundred thirty-two thousand, one hundred fifty-five".