55485009 has 24 divisors (see below), whose sum is σ = 83925504. Its totient is φ = 35280000.

The previous prime is 55484983. The next prime is 55485019. The reversal of 55485009 is 90058455.

It is a happy number.

It is not a de Polignac number, because 55485009 - 2⁵ = 55484977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55485019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18409 + ... + 21209.

It is an arithmetic number, because the mean of its divisors is an integer number (3496896).

Almost surely, 2^55485009 is an apocalyptic number.

It is an amenable number.

55485009 is a deficient number, since it is larger than the sum of its proper divisors (28440495).

55485009 is a wasteful number, since it uses less digits than its factorization.

55485009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909 (or 2906 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 55485009 is about 7448.8260148832. The cubic root of 55485009 is about 381.4098344780.

The spelling of 55485009 in words is "fifty-five million, four hundred eighty-five thousand, nine".