249500161 has 8 divisors (see below), whose sum is σ = 254847680. Its totient is φ = 244200528.

The previous prime is 249500149. The next prime is 249500189. The reversal of 249500161 is 161005942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249500161 - 2⁷ = 249500033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249500101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341 + ... + 22378.

It is an arithmetic number, because the mean of its divisors is an integer number (31855960).

Almost surely, 2^249500161 is an apocalyptic number.

It is an amenable number.

249500161 is a deficient number, since it is larger than the sum of its proper divisors (5347519).

249500161 is a wasteful number, since it uses less digits than its factorization.

249500161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23943.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 249500161 is about 15795.5740952964. The cubic root of 249500161 is about 629.5404063823.

The spelling of 249500161 in words is "two hundred forty-nine million, five hundred thousand, one hundred sixty-one".