931531481 has 2 divisors, whose sum is σ = 931531482. Its totient is φ = 931531480.

The previous prime is 931531457. The next prime is 931531543. The reversal of 931531481 is 184135139.

931531481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651270400 + 280261081 = 25520^2 + 16741^2 .

It is an emirp because it is prime and its reverse (184135139) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 931531481 - 2¹⁴ = 931515097 is a prime.

It is a super-2 number, since 2×931531481² = 1735501800188106722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (931531781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 465765740 + 465765741.

It is an arithmetic number, because the mean of its divisors is an integer number (465765741).

Almost surely, 2^931531481 is an apocalyptic number.

It is an amenable number.

931531481 is a deficient number, since it is larger than the sum of its proper divisors (1).

931531481 is an equidigital number, since it uses as much as digits as its factorization.

931531481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 931531481 is about 30521.0006552865. Note that the first 3 decimals coincide. The cubic root of 931531481 is about 976.6355126148.

The spelling of 931531481 in words is "nine hundred thirty-one million, five hundred thirty-one thousand, four hundred eighty-one".