161435500 has 24 divisors (see below), whose sum is σ = 352576224. Its totient is φ = 64574000.

The previous prime is 161435453. The next prime is 161435503. The reversal of 161435500 is 5534161.

It is a super-2 number, since 2×161435500² = 52122841320500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (161435503) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 160936 + ... + 161935.

It is an arithmetic number, because the mean of its divisors is an integer number (14690676).

Almost surely, 2^161435500 is an apocalyptic number.

161435500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161435500 is an abundant number, since it is smaller than the sum of its proper divisors (191140724).

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

161435500 is a wasteful number, since it uses less digits than its factorization.

161435500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322890 (or 322878 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 161435500 is about 12705.7270551512. The cubic root of 161435500 is about 544.5022529513.

Adding to 161435500 its reverse (5534161), we get a palindrome (166969661).

The spelling of 161435500 in words is "one hundred sixty-one million, four hundred thirty-five thousand, five hundred".