55209047 has 8 divisors (see below), whose sum is σ = 60342912. Its totient is φ = 50284800.

The previous prime is 55209023. The next prime is 55209101. The reversal of 55209047 is 74090255.

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 55209047 - 2¹⁶ = 55143511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55209017) 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, 51854 + ... + 52907.

It is an arithmetic number, because the mean of its divisors is an integer number (7542864).

Almost surely, 2^55209047 is an apocalyptic number.

55209047 is a deficient number, since it is larger than the sum of its proper divisors (5133865).

55209047 is a wasteful number, since it uses less digits than its factorization.

55209047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104809.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 55209047 is about 7430.2790660917. The cubic root of 55209047 is about 380.7764525630.

The spelling of 55209047 in words is "fifty-five million, two hundred nine thousand, forty-seven".