1662316531 has 2 divisors, whose sum is σ = 1662316532. Its totient is φ = 1662316530.

The previous prime is 1662316529. The next prime is 1662316561. The reversal of 1662316531 is 1356132661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1662316531 - 2¹ = 1662316529 is a prime.

It is a super-2 number, since 2×1662316531² = 5526592498471747922, which contains 22 as substring.

Together with 1662316529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1662316561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831158265 + 831158266.

It is an arithmetic number, because the mean of its divisors is an integer number (831158266).

Almost surely, 2^1662316531 is an apocalyptic number.

1662316531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662316531 is an equidigital number, since it uses as much as digits as its factorization.

1662316531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 1662316531 is about 40771.5161724457. The cubic root of 1662316531 is about 1184.5986715045.

The spelling of 1662316531 in words is "one billion, six hundred sixty-two million, three hundred sixteen thousand, five hundred thirty-one".