250745381 has 4 divisors (see below), whose sum is σ = 256861164. Its totient is φ = 244629600.

The previous prime is 250745377. The next prime is 250745387. The reversal of 250745381 is 183547052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50268100 + 200477281 = 7090^2 + 14159^2 .

It is a cyclic number.

It is not a de Polignac number, because 250745381 - 2² = 250745377 is a prime.

It is a super-2 number, since 2×250745381² = 125746492185670322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250745387) 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 3 ways as a sum of consecutive naturals, for example, 3057830 + ... + 3057911.

It is an arithmetic number, because the mean of its divisors is an integer number (64215291).

Almost surely, 2^250745381 is an apocalyptic number.

It is an amenable number.

250745381 is a deficient number, since it is larger than the sum of its proper divisors (6115783).

250745381 is an equidigital number, since it uses as much as digits as its factorization.

250745381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115782.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 250745381 is about 15834.9417744430. The cubic root of 250745381 is about 630.5859845591.

The spelling of 250745381 in words is "two hundred fifty million, seven hundred forty-five thousand, three hundred eighty-one".