163551427 has 4 divisors (see below), whose sum is σ = 176132320. Its totient is φ = 150970536.

The previous prime is 163551391. The next prime is 163551439. The reversal of 163551427 is 724155361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163551427 - 2⁷ = 163551299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163551392 and 163551401.

It is not an unprimeable number, because it can be changed into a prime (163551467) 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, 6290427 + ... + 6290452.

It is an arithmetic number, because the mean of its divisors is an integer number (44033080).

Almost surely, 2^163551427 is an apocalyptic number.

163551427 is a deficient number, since it is larger than the sum of its proper divisors (12580893).

163551427 is a wasteful number, since it uses less digits than its factorization.

163551427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12580892.

The product of its digits is 25200, while the sum is 34.

The square root of 163551427 is about 12788.7226492719. The cubic root of 163551427 is about 546.8708557487.

The spelling of 163551427 in words is "one hundred sixty-three million, five hundred fifty-one thousand, four hundred twenty-seven".