163343451 has 4 divisors (see below), whose sum is σ = 217791272. Its totient is φ = 108895632.

The previous prime is 163343449. The next prime is 163343461. The reversal of 163343451 is 154343361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154343361 = 3 ⋅51447787.

It is not a de Polignac number, because 163343451 - 2¹ = 163343449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163343431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27223906 + ... + 27223911.

It is an arithmetic number, because the mean of its divisors is an integer number (54447818).

Almost surely, 2^163343451 is an apocalyptic number.

163343451 is a deficient number, since it is larger than the sum of its proper divisors (54447821).

163343451 is an equidigital number, since it uses as much as digits as its factorization.

163343451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54447820.

The product of its digits is 12960, while the sum is 30.

The square root of 163343451 is about 12780.5888362000. The cubic root of 163343451 is about 546.6389526320.

The spelling of 163343451 in words is "one hundred sixty-three million, three hundred forty-three thousand, four hundred fifty-one".