161132503 has 16 divisors (see below), whose sum is σ = 192706560. Its totient is φ = 131731776.

The previous prime is 161132437. The next prime is 161132507. The reversal of 161132503 is 305231161.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 161132503 - 2⁹ = 161131991 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 (161132507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64626 + ... + 67072.

It is an arithmetic number, because the mean of its divisors is an integer number (12044160).

Almost surely, 2^161132503 is an apocalyptic number.

161132503 is a deficient number, since it is larger than the sum of its proper divisors (31574057).

161132503 is a wasteful number, since it uses less digits than its factorization.

161132503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 161132503 is about 12693.7978162566. The cubic root of 161132503 is about 544.1613822939.

Adding to 161132503 its reverse (305231161), we get a palindrome (466363664).

The spelling of 161132503 in words is "one hundred sixty-one million, one hundred thirty-two thousand, five hundred three".