331534681 has 2 divisors, whose sum is σ = 331534682. Its totient is φ = 331534680.

The previous prime is 331534633. The next prime is 331534711. The reversal of 331534681 is 186435133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304328025 + 27206656 = 17445^2 + 5216^2 .

It is a cyclic number.

It is not a de Polignac number, because 331534681 - 2¹⁵ = 331501913 is a prime.

It is a super-2 number, since 2×331534681² = 219830489411543522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331534081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165767340 + 165767341.

It is an arithmetic number, because the mean of its divisors is an integer number (165767341).

Almost surely, 2^331534681 is an apocalyptic number.

It is an amenable number.

331534681 is a deficient number, since it is larger than the sum of its proper divisors (1).

331534681 is an equidigital number, since it uses as much as digits as its factorization.

331534681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 331534681 is about 18208.0938321396. The cubic root of 331534681 is about 692.1119086002. Note that the first 3 decimals are identical.

The spelling of 331534681 in words is "three hundred thirty-one million, five hundred thirty-four thousand, six hundred eighty-one".