249246881 has 8 divisors (see below), whose sum is σ = 268644264. Its totient is φ = 229881600.

The previous prime is 249246839. The next prime is 249246887. The reversal of 249246881 is 188642942.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 249166225 = 284^2 + 15785^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-249246881 is a prime.

It is a super-2 number, since 2×249246881² = 124248015376456322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249246887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9545 + ... + 24281.

It is an arithmetic number, because the mean of its divisors is an integer number (33580533).

Almost surely, 2^249246881 is an apocalyptic number.

It is an amenable number.

249246881 is a deficient number, since it is larger than the sum of its proper divisors (19397383).

249246881 is a wasteful number, since it uses less digits than its factorization.

249246881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051.

The product of its digits is 221184, while the sum is 44.

The square root of 249246881 is about 15787.5546238168. The cubic root of 249246881 is about 629.3273083504.

The spelling of 249246881 in words is "two hundred forty-nine million, two hundred forty-six thousand, eight hundred eighty-one".