161322998 has 16 divisors (see below), whose sum is σ = 251452080. Its totient is φ = 77530656.

The previous prime is 161322991. The next prime is 161323003. The reversal of 161322998 is 899223161.

161322998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161322991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7040 + ... + 19292.

It is an arithmetic number, because the mean of its divisors is an integer number (15715755).

Almost surely, 2^161322998 is an apocalyptic number.

161322998 is a deficient number, since it is larger than the sum of its proper divisors (90129082).

161322998 is a wasteful number, since it uses less digits than its factorization.

161322998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12511.

The product of its digits is 46656, while the sum is 41.

The square root of 161322998 is about 12701.2990674183. The cubic root of 161322998 is about 544.3757383829.

The spelling of 161322998 in words is "one hundred sixty-one million, three hundred twenty-two thousand, nine hundred ninety-eight".