161255622 has 64 divisors (see below), whose sum is σ = 386519040. Its totient is φ = 44272800.

The previous prime is 161255621. The next prime is 161255651. The reversal of 161255622 is 226552161.

It is a self number, because there is not a number n which added to its sum of digits gives 161255622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161255621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26047 + ... + 31637.

It is an arithmetic number, because the mean of its divisors is an integer number (6039360).

Almost surely, 2^161255622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161255622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193259520).

161255622 is an abundant number, since it is smaller than the sum of its proper divisors (225263418).

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

161255622 is a wasteful number, since it uses less digits than its factorization.

161255622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5649.

The product of its digits is 7200, while the sum is 30.

The square root of 161255622 is about 12698.6464633047. The cubic root of 161255622 is about 544.2999422730.

The spelling of 161255622 in words is "one hundred sixty-one million, two hundred fifty-five thousand, six hundred twenty-two".