249561275 has 24 divisors (see below), whose sum is σ = 330898464. Its totient is φ = 186048000.

The previous prime is 249561271. The next prime is 249561281. The reversal of 249561275 is 572165942.

249561275 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 249561275 - 2² = 249561271 is a prime.

It is a Duffinian number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249561271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40925 + ... + 46625.

It is an arithmetic number, because the mean of its divisors is an integer number (13787436).

Almost surely, 2^249561275 is an apocalyptic number.

249561275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249561275 is a deficient number, since it is larger than the sum of its proper divisors (81337189).

249561275 is a wasteful number, since it uses less digits than its factorization.

249561275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831 (or 5826 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The square root of 249561275 is about 15797.5085060904. The cubic root of 249561275 is about 629.5918032649.

The spelling of 249561275 in words is "two hundred forty-nine million, five hundred sixty-one thousand, two hundred seventy-five".