350131681 has 2 divisors, whose sum is σ = 350131682. Its totient is φ = 350131680.

The previous prime is 350131669. The next prime is 350131709. The reversal of 350131681 is 186131053.

It is an a-pointer prime, because the next prime (350131709) can be obtained adding 350131681 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309056400 + 41075281 = 17580^2 + 6409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-350131681 is a prime.

It is a super-2 number, since 2×350131681² = 245184388079771522, which contains 22 as substring.

It is equal to p_18810217 and since 350131681 and 18810217 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (350161681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175065840 + 175065841.

It is an arithmetic number, because the mean of its divisors is an integer number (175065841).

Almost surely, 2^350131681 is an apocalyptic number.

It is an amenable number.

350131681 is a deficient number, since it is larger than the sum of its proper divisors (1).

350131681 is an equidigital number, since it uses as much as digits as its factorization.

350131681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 350131681 is about 18711.8059256716. The cubic root of 350131681 is about 704.8182426339.

The spelling of 350131681 in words is "three hundred fifty million, one hundred thirty-one thousand, six hundred eighty-one".