549857831 has 4 divisors (see below), whose sum is σ = 550078464. Its totient is φ = 549637200.

The previous prime is 549857821. The next prime is 549857879. The reversal of 549857831 is 138758945.

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 549857831 - 2⁶ = 549857767 is a prime.

It is a super-2 number, since 2×549857831² = 604687268624049122, 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 549857831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549857801) 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, 106535 + ... + 111576.

It is an arithmetic number, because the mean of its divisors is an integer number (137519616).

Almost surely, 2^549857831 is an apocalyptic number.

549857831 is a deficient number, since it is larger than the sum of its proper divisors (220633).

549857831 is a wasteful number, since it uses less digits than its factorization.

549857831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220632.

The product of its digits is 1209600, while the sum is 50.

The square root of 549857831 is about 23449.0475499539. The cubic root of 549857831 is about 819.2506693136.

The spelling of 549857831 in words is "five hundred forty-nine million, eight hundred fifty-seven thousand, eight hundred thirty-one".