55553145 has 16 divisors (see below), whose sum is σ = 89957952. Its totient is φ = 29270720.

The previous prime is 55553143. The next prime is 55553149. The reversal of 55553145 is 54135555.

It is not a de Polignac number, because 55553145 - 2¹ = 55553143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55553143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21066 + ... + 23555.

It is an arithmetic number, because the mean of its divisors is an integer number (5622372).

Almost surely, 2^55553145 is an apocalyptic number.

It is an amenable number.

55553145 is a deficient number, since it is larger than the sum of its proper divisors (34404807).

55553145 is a wasteful number, since it uses less digits than its factorization.

55553145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44712.

The product of its digits is 37500, while the sum is 33.

The square root of 55553145 is about 7453.3982182626. The cubic root of 55553145 is about 381.5658953101.

The spelling of 55553145 in words is "fifty-five million, five hundred fifty-three thousand, one hundred forty-five".