163331131 has 2 divisors, whose sum is σ = 163331132. Its totient is φ = 163331130.

The previous prime is 163331123. The next prime is 163331143. The reversal of 163331131 is 131133361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163331131 - 2³ = 163331123 is a prime.

It is a super-2 number, since 2×163331131² = 53354116707478322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163331101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81665565 + 81665566.

It is an arithmetic number, because the mean of its divisors is an integer number (81665566).

Almost surely, 2^163331131 is an apocalyptic number.

163331131 is a deficient number, since it is larger than the sum of its proper divisors (1).

163331131 is an equidigital number, since it uses as much as digits as its factorization.

163331131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 22.

The square root of 163331131 is about 12780.1068461887. The cubic root of 163331131 is about 546.6252090727.

Adding to 163331131 its reverse (131133361), we get a palindrome (294464492).

The spelling of 163331131 in words is "one hundred sixty-three million, three hundred thirty-one thousand, one hundred thirty-one".