250340681 has 4 divisors (see below), whose sum is σ = 250372500. Its totient is φ = 250308864.

The previous prime is 250340663. The next prime is 250340683. The reversal of 250340681 is 186043052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 75968656 + 174372025 = 8716^2 + 13205^2 .

It is a cyclic number.

It is not a de Polignac number, because 250340681 - 2⁶ = 250340617 is a prime.

It is a super-2 number, since 2×250340681² = 125340913127087522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250340683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5465 + ... + 23033.

It is an arithmetic number, because the mean of its divisors is an integer number (62593125).

Almost surely, 2^250340681 is an apocalyptic number.

It is an amenable number.

250340681 is a deficient number, since it is larger than the sum of its proper divisors (31819).

250340681 is a wasteful number, since it uses less digits than its factorization.

250340681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31818.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 250340681 is about 15822.1579122445. The cubic root of 250340681 is about 630.2465491715.

The spelling of 250340681 in words is "two hundred fifty million, three hundred forty thousand, six hundred eighty-one".