161222221983 has 16 divisors (see below), whose sum is σ = 215522459136. Its totient is φ = 107201902080.

The previous prime is 161222221949. The next prime is 161222222017. The reversal of 161222221983 is 389122222161.

It is an interprime number because it is at equal distance from previous prime (161222221949) and next prime (161222222017).

It is not a de Polignac number, because 161222221983 - 2¹³ = 161222213791 is a prime.

It is a super-2 number, since 2×161222221983² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161222221933) 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, 4149738 + ... + 4188408.

It is an arithmetic number, because the mean of its divisors is an integer number (13470153696).

Almost surely, 2^161222221983 is an apocalyptic number.

161222221983 is a deficient number, since it is larger than the sum of its proper divisors (54300237153).

161222221983 is a wasteful number, since it uses less digits than its factorization.

161222221983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42254.

The product of its digits is 41472, while the sum is 39.

The spelling of 161222221983 in words is "one hundred sixty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, nine hundred eighty-three".