161425213 has 8 divisors (see below), whose sum is σ = 165253248. Its totient is φ = 157613664.

The previous prime is 161425207. The next prime is 161425237. The reversal of 161425213 is 312524161.

It is a happy number.

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 161425213 - 2²⁵ = 127870781 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161425283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16945 + ... + 24697.

It is an arithmetic number, because the mean of its divisors is an integer number (20656656).

Almost surely, 2^161425213 is an apocalyptic number.

It is an amenable number.

161425213 is a deficient number, since it is larger than the sum of its proper divisors (3828035).

161425213 is an equidigital number, since it uses as much as digits as its factorization.

161425213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8243.

The product of its digits is 1440, while the sum is 25.

The square root of 161425213 is about 12705.3222312541. The cubic root of 161425213 is about 544.4906871068.

Adding to 161425213 its reverse (312524161), we get a palindrome (473949374).

The spelling of 161425213 in words is "one hundred sixty-one million, four hundred twenty-five thousand, two hundred thirteen".