249433381 has 8 divisors (see below), whose sum is σ = 255939264. Its totient is φ = 242947680.

The previous prime is 249433369. The next prime is 249433397. The reversal of 249433381 is 183334942.

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

It is a cyclic number.

It is not a de Polignac number, because 249433381 - 2⁷ = 249433253 is a prime.

It is a super-2 number, since 2×249433381² = 124434023114182322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249433381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249433081) 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, 21826 + ... + 31228.

It is an arithmetic number, because the mean of its divisors is an integer number (31992408).

Almost surely, 2^249433381 is an apocalyptic number.

It is an amenable number.

249433381 is a deficient number, since it is larger than the sum of its proper divisors (6505883).

249433381 is an equidigital number, since it uses as much as digits as its factorization.

249433381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10091.

The product of its digits is 62208, while the sum is 37.

The square root of 249433381 is about 15793.4600705482. The cubic root of 249433381 is about 629.4842347957.

The spelling of 249433381 in words is "two hundred forty-nine million, four hundred thirty-three thousand, three hundred eighty-one".