161222701 has 8 divisors (see below), whose sum is σ = 165602304. Its totient is φ = 156864480.

The previous prime is 161222693. The next prime is 161222741. The reversal of 161222701 is 107222161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161222701 - 2³ = 161222693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161222741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10570 + ... + 20836.

It is an arithmetic number, because the mean of its divisors is an integer number (20700288).

Almost surely, 2^161222701 is an apocalyptic number.

It is an amenable number.

161222701 is a deficient number, since it is larger than the sum of its proper divisors (4379603).

161222701 is a wasteful number, since it uses less digits than its factorization.

161222701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 161222701 is about 12697.3501566272. The cubic root of 161222701 is about 544.2628993931.

Adding to 161222701 its reverse (107222161), we get a palindrome (268444862).

The spelling of 161222701 in words is "one hundred sixty-one million, two hundred twenty-two thousand, seven hundred one".