161563000 has 32 divisors (see below), whose sum is σ = 378059760. Its totient is φ = 64624800.

The previous prime is 161562983. The next prime is 161563013. The reversal of 161563000 is 365161.

It is a super-2 number, since 2×161563000² = 52205205938000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79782 + ... + 81781.

Almost surely, 2^161563000 is an apocalyptic number.

161563000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161563000 is an abundant number, since it is smaller than the sum of its proper divisors (216496760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161563000 is a wasteful number, since it uses less digits than its factorization.

161563000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161584 (or 161570 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 161563000 is about 12710.7434873024. The cubic root of 161563000 is about 544.6455625465.

The spelling of 161563000 in words is "one hundred sixty-one million, five hundred sixty-three thousand".