161030011231 has 8 divisors (see below), whose sum is σ = 169729207280. Its totient is φ = 152353208448.

The previous prime is 161030011169. The next prime is 161030011253. The reversal of 161030011231 is 132110030161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161030011231 - 2⁹ = 161030010719 is a prime.

It is a super-2 number, since 2×161030011231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161030011199 and 161030011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161030011031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5583546 + ... + 5612311.

It is an arithmetic number, because the mean of its divisors is an integer number (21216150910).

Almost surely, 2^161030011231 is an apocalyptic number.

161030011231 is a deficient number, since it is larger than the sum of its proper divisors (8699196049).

161030011231 is a wasteful number, since it uses less digits than its factorization.

161030011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11196633.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 161030011231 its reverse (132110030161), we get a palindrome (293140041392).

The spelling of 161030011231 in words is "one hundred sixty-one billion, thirty million, eleven thousand, two hundred thirty-one".