55867219 has 4 divisors (see below), whose sum is σ = 59153544. Its totient is φ = 52580896.

The previous prime is 55867193. The next prime is 55867237. The reversal of 55867219 is 91276855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55867219 - 2¹¹ = 55865171 is a prime.

It is a super-2 number, since 2×55867219² = 6242292317587922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55867289) 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, 1643137 + ... + 1643170.

It is an arithmetic number, because the mean of its divisors is an integer number (14788386).

Almost surely, 2^55867219 is an apocalyptic number.

55867219 is a deficient number, since it is larger than the sum of its proper divisors (3286325).

55867219 is a wasteful number, since it uses less digits than its factorization.

55867219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286324.

The product of its digits is 151200, while the sum is 43.

The square root of 55867219 is about 7474.4377046036. The cubic root of 55867219 is about 382.2836152054.

The spelling of 55867219 in words is "fifty-five million, eight hundred sixty-seven thousand, two hundred nineteen".