161423532 has 36 divisors (see below), whose sum is σ = 410417280. Its totient is φ = 53494752.

The previous prime is 161423527. The next prime is 161423533. The reversal of 161423532 is 235324161.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 161423496 and 161423505.

It is not an unprimeable number, because it can be changed into a prime (161423533) 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 11 ways as a sum of consecutive naturals, for example, 6732 + ... + 19187.

It is an arithmetic number, because the mean of its divisors is an integer number (11400480).

Almost surely, 2^161423532 is an apocalyptic number.

161423532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161423532 is an abundant number, since it is smaller than the sum of its proper divisors (248993748).

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

161423532 is a wasteful number, since it uses less digits than its factorization.

161423532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26102 (or 26097 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 161423532 is about 12705.2560777026. The cubic root of 161423532 is about 544.4887970840.

Adding to 161423532 its reverse (235324161), we get a palindrome (396747693).

The spelling of 161423532 in words is "one hundred sixty-one million, four hundred twenty-three thousand, five hundred thirty-two".