161036213 has 6 divisors (see below), whose sum is σ = 174376674. Its totient is φ = 148648656.

The previous prime is 161036209. The next prime is 161036221. The reversal of 161036213 is 312630161.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14190289 + 146845924 = 3767^2 + 12118^2 .

It is not a de Polignac number, because 161036213 - 2² = 161036209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161036203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 476270 + ... + 476607.

It is an arithmetic number, because the mean of its divisors is an integer number (29062779).

Almost surely, 2^161036213 is an apocalyptic number.

161036213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161036213 is a deficient number, since it is larger than the sum of its proper divisors (13340461).

161036213 is an equidigital number, since it uses as much as digits as its factorization.

161036213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952903 (or 952890 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 161036213 is about 12690.0044523239. The cubic root of 161036213 is about 544.0529668817.

Adding to 161036213 its reverse (312630161), we get a palindrome (473666374).

The spelling of 161036213 in words is "one hundred sixty-one million, thirty-six thousand, two hundred thirteen".