163551425 has 12 divisors (see below), whose sum is σ = 203379840. Its totient is φ = 130469520.

The previous prime is 163551391. The next prime is 163551439. The reversal of 163551425 is 524155361.

It is not a de Polignac number, because 163551425 - 2⁶ = 163551361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163551391 and 163551400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137 + ... + 18086.

It is an arithmetic number, because the mean of its divisors is an integer number (16948320).

Almost surely, 2^163551425 is an apocalyptic number.

It is an amenable number.

163551425 is a deficient number, since it is larger than the sum of its proper divisors (39828415).

163551425 is a wasteful number, since it uses less digits than its factorization.

163551425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592 (or 18587 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 163551425 is about 12788.7225710780. The cubic root of 163551425 is about 546.8708535196.

The spelling of 163551425 in words is "one hundred sixty-three million, five hundred fifty-one thousand, four hundred twenty-five".