161297458231 has 32 divisors (see below), whose sum is σ = 203945817600. Its totient is φ = 124133959296.

The previous prime is 161297458139. The next prime is 161297458249. The reversal of 161297458231 is 132854792161.

It is a happy number.

161297458231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161297458231 - 2³¹ = 159149974583 is a prime.

It is a super-2 number, since 2×161297458231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161297458331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18537720 + ... + 18546418.

It is an arithmetic number, because the mean of its divisors is an integer number (6373306800).

Almost surely, 2^161297458231 is an apocalyptic number.

161297458231 is a deficient number, since it is larger than the sum of its proper divisors (42648359369).

161297458231 is a wasteful number, since it uses less digits than its factorization.

161297458231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14263.

The product of its digits is 725760, while the sum is 49.

The spelling of 161297458231 in words is "one hundred sixty-one billion, two hundred ninety-seven million, four hundred fifty-eight thousand, two hundred thirty-one".