161222015424 has 56 divisors (see below), whose sum is σ = 426615766528. Its totient is φ = 53734475520.

The previous prime is 161222015393. The next prime is 161222015477. The reversal of 161222015424 is 424510222161.

161222015424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161222015391 and 161222015400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805559 + ... + 1892745.

It is an arithmetic number, because the mean of its divisors is an integer number (7618138688).

Almost surely, 2^161222015424 is an apocalyptic number.

It is an amenable number.

161222015424 is an abundant number, since it is smaller than the sum of its proper divisors (265393751104).

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

161222015424 is an equidigital number, since it uses as much as digits as its factorization.

161222015424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96833 (or 96823 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 161222015424 its reverse (424510222161), we get a palindrome (585732237585).

The spelling of 161222015424 in words is "one hundred sixty-one billion, two hundred twenty-two million, fifteen thousand, four hundred twenty-four".