163235553 has 16 divisors (see below), whose sum is σ = 241952256. Its totient is φ = 97211520.

The previous prime is 163235549. The next prime is 163235599. The reversal of 163235553 is 355532361.

It is not a de Polignac number, because 163235553 - 2² = 163235549 is a prime.

It is a super-5 number, since 5×163235553⁵ (a number of 42 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (163235543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66300 + ... + 68717.

It is an arithmetic number, because the mean of its divisors is an integer number (15122016).

Almost surely, 2^163235553 is an apocalyptic number.

163235553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163235553 is a deficient number, since it is larger than the sum of its proper divisors (78716703).

163235553 is a wasteful number, since it uses less digits than its factorization.

163235553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135064.

The product of its digits is 40500, while the sum is 33.

The square root of 163235553 is about 12776.3669718743. The cubic root of 163235553 is about 546.5185636785.

The spelling of 163235553 in words is "one hundred sixty-three million, two hundred thirty-five thousand, five hundred fifty-three".