161316001 has 16 divisors (see below), whose sum is σ = 201979008. Its totient is φ = 125164800.

The previous prime is 161315981. The next prime is 161316007. The reversal of 161316001 is 100613161.

It is a cyclic number.

It is not a de Polignac number, because 161316001 - 2¹¹ = 161313953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161316001.

It is not an unprimeable number, because it can be changed into a prime (161316007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14211 + ... + 22903.

It is an arithmetic number, because the mean of its divisors is an integer number (12623688).

Almost surely, 2^161316001 is an apocalyptic number.

161316001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161316001 is a deficient number, since it is larger than the sum of its proper divisors (40663007).

161316001 is a wasteful number, since it uses less digits than its factorization.

161316001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8952.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 161316001 is about 12701.0236201654. The cubic root of 161316001 is about 544.3678679364.

Adding to 161316001 its reverse (100613161), we get a palindrome (261929162).

The spelling of 161316001 in words is "one hundred sixty-one million, three hundred sixteen thousand, one".