161022441 has 4 divisors (see below), whose sum is σ = 214696592. Its totient is φ = 107348292.

The previous prime is 161022439. The next prime is 161022443. The reversal of 161022441 is 144220161.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (161022439) and next prime (161022443).

It is not a de Polignac number, because 161022441 - 2¹ = 161022439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161022443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26837071 + ... + 26837076.

It is an arithmetic number, because the mean of its divisors is an integer number (53674148).

Almost surely, 2^161022441 is an apocalyptic number.

It is an amenable number.

161022441 is a deficient number, since it is larger than the sum of its proper divisors (53674151).

161022441 is an equidigital number, since it uses as much as digits as its factorization.

161022441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53674150.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 161022441 is about 12689.4618089185. The cubic root of 161022441 is about 544.0374570968.

The spelling of 161022441 in words is "one hundred sixty-one million, twenty-two thousand, four hundred forty-one".