54206409 has 4 divisors (see below), whose sum is σ = 72275216. Its totient is φ = 36137604.

The previous prime is 54206401. The next prime is 54206419. The reversal of 54206409 is 90460245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54206409 - 2³ = 54206401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54206401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9034399 + ... + 9034404.

It is an arithmetic number, because the mean of its divisors is an integer number (18068804).

Almost surely, 2^54206409 is an apocalyptic number.

It is an amenable number.

54206409 is a deficient number, since it is larger than the sum of its proper divisors (18068807).

54206409 is a wasteful number, since it uses less digits than its factorization.

54206409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18068806.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 54206409 is about 7362.5001867572. The cubic root of 54206409 is about 378.4572934812.

It can be divided in two parts, 54206 and 409, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 54206409 in words is "fifty-four million, two hundred six thousand, four hundred nine".