161244237 has 96 divisors (see below), whose sum is σ = 294174720. Its totient is φ = 76665600.

The previous prime is 161244233. The next prime is 161244247. The reversal of 161244237 is 732442161.

It is not a de Polignac number, because 161244237 - 2² = 161244233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161244233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1811689 + ... + 1811777.

It is an arithmetic number, because the mean of its divisors is an integer number (3064320).

Almost surely, 2^161244237 is an apocalyptic number.

It is an amenable number.

161244237 is a deficient number, since it is larger than the sum of its proper divisors (132930483).

161244237 is a wasteful number, since it uses less digits than its factorization.

161244237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 164 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 161244237 is about 12698.1981792694. The cubic root of 161244237 is about 544.2871323823.

Adding to 161244237 its reverse (732442161), we get a palindrome (893686398).

It can be divided in two parts, 16 and 1244237, that added together give a triangular number (1244253 = T₁₅₇₇).

The spelling of 161244237 in words is "one hundred sixty-one million, two hundred forty-four thousand, two hundred thirty-seven".