161222555013 has 8 divisors (see below), whose sum is σ = 231499053408. Its totient is φ = 99213879984.

The previous prime is 161222555003. The next prime is 161222555033. The reversal of 161222555013 is 310555222161.

161222555013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161222555013 - 2³³ = 152632620421 is a prime.

It is a super-2 number, since 2×161222555013² (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 (161222555003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2066955795 + ... + 2066955872.

It is an arithmetic number, because the mean of its divisors is an integer number (28937381676).

Almost surely, 2^161222555013 is an apocalyptic number.

161222555013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161222555013 is a deficient number, since it is larger than the sum of its proper divisors (70276498395).

161222555013 is a wasteful number, since it uses less digits than its factorization.

161222555013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133911683.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 161222555013 its reverse (310555222161), we get a palindrome (471777777174).

The spelling of 161222555013 in words is "one hundred sixty-one billion, two hundred twenty-two million, five hundred fifty-five thousand, thirteen".