55381817 has 8 divisors (see below), whose sum is σ = 55960320. Its totient is φ = 54806400.

The previous prime is 55381771. The next prime is 55381819. The reversal of 55381817 is 71818355.

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 55381817 - 2¹⁴ = 55365433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55381819) 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, 52784 + ... + 53822.

It is an arithmetic number, because the mean of its divisors is an integer number (6995040).

Almost surely, 2^55381817 is an apocalyptic number.

It is an amenable number.

55381817 is a deficient number, since it is larger than the sum of its proper divisors (578503).

55381817 is a wasteful number, since it uses less digits than its factorization.

55381817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543.

The product of its digits is 33600, while the sum is 38.

The square root of 55381817 is about 7441.8960621605. The cubic root of 55381817 is about 381.1732368249.

The spelling of 55381817 in words is "fifty-five million, three hundred eighty-one thousand, eight hundred seventeen".