161201310 has 48 divisors (see below), whose sum is σ = 411001776. Its totient is φ = 40456192.

The previous prime is 161201297. The next prime is 161201347. The reversal of 161201310 is 13102161.

It is a super-2 number, since 2×161201310² = 51971724691432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 161201310.

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 23 ways as a sum of consecutive naturals, for example, 627 + ... + 17966.

It is an arithmetic number, because the mean of its divisors is an integer number (8562537).

Almost surely, 2^161201310 is an apocalyptic number.

161201310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161201310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205500888).

161201310 is an abundant number, since it is smaller than the sum of its proper divisors (249800466).

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

161201310 is a wasteful number, since it uses less digits than its factorization.

161201310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18637 (or 18620 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 161201310 is about 12696.5077875769. The cubic root of 161201310 is about 544.2388274261.

Adding to 161201310 its reverse (13102161), we get a palindrome (174303471).

The spelling of 161201310 in words is "one hundred sixty-one million, two hundred one thousand, three hundred ten".