161435100 has 36 divisors (see below), whose sum is σ = 467086424. Its totient is φ = 43049280.

The previous prime is 161435069. The next prime is 161435147. The reversal of 161435100 is 1534161.

It is a super-2 number, since 2×161435100² = 52122583024020000, 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 (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268759 + ... + 269358.

Almost surely, 2^161435100 is an apocalyptic number.

161435100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161435100 is an abundant number, since it is smaller than the sum of its proper divisors (305651324).

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

161435100 is a wasteful number, since it uses less digits than its factorization.

161435100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538134 (or 538127 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 161435100 is about 12705.7113142083. The cubic root of 161435100 is about 544.5018032339.

Adding to 161435100 its reverse (1534161), we get a palindrome (162969261).

The spelling of 161435100 in words is "one hundred sixty-one million, four hundred thirty-five thousand, one hundred".