54451209 has 8 divisors (see below), whose sum is σ = 72689760. Its totient is φ = 36256736.

The previous prime is 54451147. The next prime is 54451213. The reversal of 54451209 is 90215445.

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

It is a cyclic number.

It is not a de Polignac number, because 54451209 - 2⁷ = 54451081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54451219) 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, 8019 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (9086220).

Almost surely, 2^54451209 is an apocalyptic number.

It is an amenable number.

54451209 is a deficient number, since it is larger than the sum of its proper divisors (18238551).

54451209 is a wasteful number, since it uses less digits than its factorization.

54451209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22039.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 54451209 is about 7379.1062466941. The cubic root of 54451209 is about 379.0261513597.

The spelling of 54451209 in words is "fifty-four million, four hundred fifty-one thousand, two hundred nine".