55555145 has 8 divisors (see below), whose sum is σ = 70175040. Its totient is φ = 42104880.

The previous prime is 55555141. The next prime is 55555147. The reversal of 55555145 is 54155555.

It is a happy number.

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

It is not a de Polignac number, because 55555145 - 2² = 55555141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55555141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292301 + ... + 292490.

It is an arithmetic number, because the mean of its divisors is an integer number (8771880).

Almost surely, 2^55555145 is an apocalyptic number.

It is an amenable number.

55555145 is a deficient number, since it is larger than the sum of its proper divisors (14619895).

55555145 is a wasteful number, since it uses less digits than its factorization.

55555145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584815.

The product of its digits is 62500, while the sum is 35.

The square root of 55555145 is about 7453.5323840445. The cubic root of 55555145 is about 381.5704742445.

The spelling of 55555145 in words is "fifty-five million, five hundred fifty-five thousand, one hundred forty-five".