163940271 has 24 divisors (see below), whose sum is σ = 241337472. Its totient is φ = 98172000.

The previous prime is 163940269. The next prime is 163940279. The reversal of 163940271 is 172049361.

It is not a de Polignac number, because 163940271 - 2¹ = 163940269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163940279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336390 + ... + 336876.

It is an arithmetic number, because the mean of its divisors is an integer number (10055728).

Almost surely, 2^163940271 is an apocalyptic number.

163940271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163940271 is a deficient number, since it is larger than the sum of its proper divisors (77397201).

163940271 is a wasteful number, since it uses less digits than its factorization.

163940271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 163940271 is about 12803.9162368394. The cubic root of 163940271 is about 547.3039084259.

The spelling of 163940271 in words is "one hundred sixty-three million, nine hundred forty thousand, two hundred seventy-one".