161033502 has 48 divisors (see below), whose sum is σ = 378224640. Its totient is φ = 45570672.

The previous prime is 161033501. The next prime is 161033507. The reversal of 161033502 is 205330161.

161033502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161033501) 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, 28899 + ... + 34017.

It is an arithmetic number, because the mean of its divisors is an integer number (7879680).

Almost surely, 2^161033502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161033502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189112320).

161033502 is an abundant number, since it is smaller than the sum of its proper divisors (217191138).

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

161033502 is a wasteful number, since it uses less digits than its factorization.

161033502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245 (or 5238 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 161033502 is about 12689.8976355209. The cubic root of 161033502 is about 544.0499138709.

Adding to 161033502 its reverse (205330161), we get a palindrome (366363663).

The spelling of 161033502 in words is "one hundred sixty-one million, thirty-three thousand, five hundred two".