162931481 has 2 divisors, whose sum is σ = 162931482. Its totient is φ = 162931480.

The previous prime is 162931463. The next prime is 162931493. The reversal of 162931481 is 184139261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 52345225 = 10516^2 + 7235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162931481 is a prime.

It is a super-2 number, since 2×162931481² = 53093335001706722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (182931481) 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, 81465740 + 81465741.

It is an arithmetic number, because the mean of its divisors is an integer number (81465741).

Almost surely, 2^162931481 is an apocalyptic number.

It is an amenable number.

162931481 is a deficient number, since it is larger than the sum of its proper divisors (1).

162931481 is an equidigital number, since it uses as much as digits as its factorization.

162931481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 162931481 is about 12764.4616416048. The cubic root of 162931481 is about 546.1790047144.

The spelling of 162931481 in words is "one hundred sixty-two million, nine hundred thirty-one thousand, four hundred eighty-one".