249978226 has 16 divisors (see below), whose sum is σ = 379048320. Its totient is φ = 123636240.

The previous prime is 249978181. The next prime is 249978229. The reversal of 249978226 is 622879942.

It is a super-2 number, since 2×249978226² = 124978226948214152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249978226.

It is not an unprimeable number, because it can be changed into a prime (249978229) 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, 73381 + ... + 76711.

It is an arithmetic number, because the mean of its divisors is an integer number (23690520).

Almost surely, 2^249978226 is an apocalyptic number.

249978226 is a deficient number, since it is larger than the sum of its proper divisors (129070094).

249978226 is a wasteful number, since it uses less digits than its factorization.

249978226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3729.

The product of its digits is 870912, while the sum is 49.

The square root of 249978226 is about 15810.6997315109. The cubic root of 249978226 is about 629.9422354025.

The spelling of 249978226 in words is "two hundred forty-nine million, nine hundred seventy-eight thousand, two hundred twenty-six".