310491481 has 2 divisors, whose sum is σ = 310491482. Its totient is φ = 310491480.

The previous prime is 310491479. The next prime is 310491491. The reversal of 310491481 is 184194013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299601481 + 10890000 = 17309^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 310491481 - 2¹ = 310491479 is a prime.

It is a super-2 number, since 2×310491481² = 192809919547146722, which contains 22 as substring.

Together with 310491479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (310491491) 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 as a sum of consecutive naturals, namely, 155245740 + 155245741.

It is an arithmetic number, because the mean of its divisors is an integer number (155245741).

Almost surely, 2^310491481 is an apocalyptic number.

It is an amenable number.

310491481 is a deficient number, since it is larger than the sum of its proper divisors (1).

310491481 is an equidigital number, since it uses as much as digits as its factorization.

310491481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 310491481 is about 17620.7684565685. The cubic root of 310491481 is about 677.1474223802.

The spelling of 310491481 in words is "three hundred ten million, four hundred ninety-one thousand, four hundred eighty-one".