161423526 has 32 divisors (see below), whose sum is σ = 361721088. Its totient is φ = 47593440.

The previous prime is 161423491. The next prime is 161423527. The reversal of 161423526 is 625324161.

It is a junction number, because it is equal to n+sod(n) for n = 161423493 and 161423502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161423527) 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 15 ways as a sum of consecutive naturals, for example, 30610 + ... + 35493.

It is an arithmetic number, because the mean of its divisors is an integer number (11303784).

Almost surely, 2^161423526 is an apocalyptic number.

161423526 is an abundant number, since it is smaller than the sum of its proper divisors (200297562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161423526 is a wasteful number, since it uses less digits than its factorization.

161423526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66156.

The product of its digits is 8640, while the sum is 30.

The square root of 161423526 is about 12705.2558415799. The cubic root of 161423526 is about 544.4887903379.

Adding to 161423526 its reverse (625324161), we get a palindrome (786747687).

The spelling of 161423526 in words is "one hundred sixty-one million, four hundred twenty-three thousand, five hundred twenty-six".