161352901 has 4 divisors (see below), whose sum is σ = 161840704. Its totient is φ = 160865100.

The previous prime is 161352871. The next prime is 161352907. The reversal of 161352901 is 109253161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109253161 = 1559 ⋅70079.

It is a cyclic number.

It is not a de Polignac number, because 161352901 - 2¹¹ = 161350853 is a prime.

It is a super-2 number, since 2×161352901² = 52069517322231602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161352901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161352907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 243405 + ... + 244066.

It is an arithmetic number, because the mean of its divisors is an integer number (40460176).

Almost surely, 2^161352901 is an apocalyptic number.

It is an amenable number.

161352901 is a deficient number, since it is larger than the sum of its proper divisors (487803).

161352901 is an equidigital number, since it uses as much as digits as its factorization.

161352901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487802.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 161352901 is about 12702.4761759273. The cubic root of 161352901 is about 544.4093716574.

The spelling of 161352901 in words is "one hundred sixty-one million, three hundred fifty-two thousand, nine hundred one".