161313030 has 48 divisors (see below), whose sum is σ = 437654880. Its totient is φ = 41145984.

The previous prime is 161313029. The next prime is 161313041. The reversal of 161313030 is 30313161.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 161312994 and 161313012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36895 + ... + 41034.

It is an arithmetic number, because the mean of its divisors is an integer number (9117810).

Almost surely, 2^161313030 is an apocalyptic number.

161313030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161313030 is an abundant number, since it is smaller than the sum of its proper divisors (276341850).

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

161313030 is a wasteful number, since it uses less digits than its factorization.

161313030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77965 (or 77962 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 161313030 is about 12700.9066605499. The cubic root of 161313030 is about 544.3645259929.

Adding to 161313030 its reverse (30313161), we get a palindrome (191626191).

The spelling of 161313030 in words is "one hundred sixty-one million, three hundred thirteen thousand, thirty".