161503214 has 4 divisors (see below), whose sum is σ = 242254824. Its totient is φ = 80751606.

The previous prime is 161503201. The next prime is 161503241. The reversal of 161503214 is 412305161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 412305161 = 61 ⋅6759101.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 161503214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40375802 + ... + 40375805.

It is an arithmetic number, because the mean of its divisors is an integer number (60563706).

Almost surely, 2^161503214 is an apocalyptic number.

161503214 is a deficient number, since it is larger than the sum of its proper divisors (80751610).

161503214 is an equidigital number, since it uses as much as digits as its factorization.

161503214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80751609.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161503214 is about 12708.3914796484. The cubic root of 161503214 is about 544.5783726641.

Adding to 161503214 its reverse (412305161), we get a palindrome (573808375).

The spelling of 161503214 in words is "one hundred sixty-one million, five hundred three thousand, two hundred fourteen".