1982365531 has 2 divisors, whose sum is σ = 1982365532. Its totient is φ = 1982365530.

The previous prime is 1982365471. The next prime is 1982365537. The reversal of 1982365531 is 1355632891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982365531 is a prime.

It is a super-2 number, since 2×1982365531² = 7859546196993823922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1982365537) 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, 991182765 + 991182766.

It is an arithmetic number, because the mean of its divisors is an integer number (991182766).

Almost surely, 2^1982365531 is an apocalyptic number.

1982365531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982365531 is an equidigital number, since it uses as much as digits as its factorization.

1982365531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 1982365531 is about 44523.7636661592. The cubic root of 1982365531 is about 1256.2071063925.

The spelling of 1982365531 in words is "one billion, nine hundred eighty-two million, three hundred sixty-five thousand, five hundred thirty-one".