249771916 has 12 divisors (see below), whose sum is σ = 440543488. Its totient is φ = 123902352.

The previous prime is 249771911. The next prime is 249771917. The reversal of 249771916 is 619177942.

It is a super-2 number, since 2×249771916² = 124772020044622112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (249771911) 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, 245331 + ... + 246346.

Almost surely, 2^249771916 is an apocalyptic number.

It is an amenable number.

249771916 is a deficient number, since it is larger than the sum of its proper divisors (190771572).

249771916 is a wasteful number, since it uses less digits than its factorization.

249771916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491808 (or 491806 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 249771916 is about 15804.1740056227. The cubic root of 249771916 is about 629.7688881014.

The spelling of 249771916 in words is "two hundred forty-nine million, seven hundred seventy-one thousand, nine hundred sixteen".