161236312 has 16 divisors (see below), whose sum is σ = 303147360. Its totient is φ = 80397024.

The previous prime is 161236307. The next prime is 161236319. The reversal of 161236312 is 213632161.

It is a super-2 number, since 2×161236312² = 51994296614722688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161236319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24523 + ... + 30394.

It is an arithmetic number, because the mean of its divisors is an integer number (18946710).

Almost surely, 2^161236312 is an apocalyptic number.

It is an amenable number.

161236312 is a deficient number, since it is larger than the sum of its proper divisors (141911048).

161236312 is a wasteful number, since it uses less digits than its factorization.

161236312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55290 (or 55286 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 161236312 is about 12697.8861232884. The cubic root of 161236312 is about 544.2782151723.

Adding to 161236312 its reverse (213632161), we get a palindrome (374868473).

The spelling of 161236312 in words is "one hundred sixty-one million, two hundred thirty-six thousand, three hundred twelve".