163271531 has 6 divisors (see below), whose sum is σ = 164490900. Its totient is φ = 162061136.

The previous prime is 163271509. The next prime is 163271539. The reversal of 163271531 is 135172361.

It is not a de Polignac number, because 163271531 - 2¹⁸ = 163009387 is a prime.

It is a super-2 number, since 2×163271531² = 53315185670167922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163271494 and 163271503.

It is not an unprimeable number, because it can be changed into a prime (163271539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14420 + ... + 23118.

It is an arithmetic number, because the mean of its divisors is an integer number (27415150).

Almost surely, 2^163271531 is an apocalyptic number.

163271531 is a deficient number, since it is larger than the sum of its proper divisors (1219369).

163271531 is an frugal number, since it uses more digits than its factorization.

163271531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973 (or 8836 counting only the distinct ones).

The product of its digits is 3780, while the sum is 29.

The square root of 163271531 is about 12777.7748845407. The cubic root of 163271531 is about 546.5587126128.

The spelling of 163271531 in words is "one hundred sixty-three million, two hundred seventy-one thousand, five hundred thirty-one".