163406025 has 24 divisors (see below), whose sum is σ = 300184160. Its totient is φ = 87149520.

The previous prime is 163406021. The next prime is 163406029. The reversal of 163406025 is 520604361.

163406025 is a `hidden beast` number, since 1 + 634 + 0 + 6 + 0 + 25 = 666.

163406025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163406021) and next prime (163406029).

It is not a de Polignac number, because 163406025 - 2² = 163406021 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 163406025.

It is not an unprimeable number, because it can be changed into a prime (163406021) 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, 120367 + ... + 121716.

Almost surely, 2^163406025 is an apocalyptic number.

163406025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163406025 is a deficient number, since it is larger than the sum of its proper divisors (136778135).

163406025 is a wasteful number, since it uses less digits than its factorization.

163406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242102 (or 242091 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 163406025 is about 12783.0366110717. The cubic root of 163406025 is about 546.7087463064.

The spelling of 163406025 in words is "one hundred sixty-three million, four hundred six thousand, twenty-five".