161231053 has 4 divisors (see below), whose sum is σ = 162408060. Its totient is φ = 160054048.

The previous prime is 161231051. The next prime is 161231087. The reversal of 161231053 is 350132161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66227044 + 95004009 = 8138^2 + 9747^2 .

It is a cyclic number.

It is not a de Polignac number, because 161231053 - 2¹ = 161231051 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 (161231051) 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 3 ways as a sum of consecutive naturals, for example, 588298 + ... + 588571.

It is an arithmetic number, because the mean of its divisors is an integer number (40602015).

Almost surely, 2^161231053 is an apocalyptic number.

It is an amenable number.

161231053 is a deficient number, since it is larger than the sum of its proper divisors (1177007).

161231053 is a wasteful number, since it uses less digits than its factorization.

161231053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177006.

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

The square root of 161231053 is about 12697.6790398876. The cubic root of 161231053 is about 544.2722975841.

The spelling of 161231053 in words is "one hundred sixty-one million, two hundred thirty-one thousand, fifty-three".