161425313 has 4 divisors (see below), whose sum is σ = 184486080. Its totient is φ = 138364548.

The previous prime is 161425309. The next prime is 161425321. The reversal of 161425313 is 313524161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161425313 - 2² = 161425309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161421313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11530373 + ... + 11530386.

It is an arithmetic number, because the mean of its divisors is an integer number (46121520).

Almost surely, 2^161425313 is an apocalyptic number.

It is an amenable number.

161425313 is a deficient number, since it is larger than the sum of its proper divisors (23060767).

161425313 is an equidigital number, since it uses as much as digits as its factorization.

161425313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23060766.

The product of its digits is 2160, while the sum is 26.

The square root of 161425313 is about 12705.3261666122. The cubic root of 161425313 is about 544.4907995409.

Adding to 161425313 its reverse (313524161), we get a palindrome (474949474).

The spelling of 161425313 in words is "one hundred sixty-one million, four hundred twenty-five thousand, three hundred thirteen".