55249919 has 8 divisors (see below), whose sum is σ = 56709072. Its totient is φ = 53796160.

The previous prime is 55249913. The next prime is 55249927. The reversal of 55249919 is 91994255.

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 55249919 - 2¹² = 55245823 is a prime.

It is a super-2 number, since 2×55249919² = 6105107099013122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55249919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55249913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27017 + ... + 28989.

It is an arithmetic number, because the mean of its divisors is an integer number (7088634).

Almost surely, 2^55249919 is an apocalyptic number.

55249919 is a deficient number, since it is larger than the sum of its proper divisors (1459153).

55249919 is a wasteful number, since it uses less digits than its factorization.

55249919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697.

The product of its digits is 145800, while the sum is 44.

The square root of 55249919 is about 7433.0289250076. The cubic root of 55249919 is about 380.8703940278.

The spelling of 55249919 in words is "fifty-five million, two hundred forty-nine thousand, nine hundred nineteen".