549811157 has 8 divisors (see below), whose sum is σ = 645338496. Its totient is φ = 458529552.

The previous prime is 549811153. The next prime is 549811169. The reversal of 549811157 is 751118945.

It is a happy number.

549811157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 549811157 - 2² = 549811153 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 (549811153) 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, 1061153 + ... + 1061670.

It is an arithmetic number, because the mean of its divisors is an integer number (80667312).

Almost surely, 2^549811157 is an apocalyptic number.

It is an amenable number.

549811157 is a deficient number, since it is larger than the sum of its proper divisors (95527339).

549811157 is a wasteful number, since it uses less digits than its factorization.

549811157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122867.

The product of its digits is 50400, while the sum is 41.

The square root of 549811157 is about 23448.0523071747. The cubic root of 549811157 is about 819.2274882987.

The spelling of 549811157 in words is "five hundred forty-nine million, eight hundred eleven thousand, one hundred fifty-seven".