213425161 has 4 divisors (see below), whose sum is σ = 215383300. Its totient is φ = 211467024.

The previous prime is 213425143. The next prime is 213425171. The reversal of 213425161 is 161524312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166926400 + 46498761 = 12920^2 + 6819^2 .

It is a cyclic number.

It is not a de Polignac number, because 213425161 - 2⁷ = 213425033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213425171) 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, 978906 + ... + 979123.

It is an arithmetic number, because the mean of its divisors is an integer number (53845825).

Almost surely, 2^213425161 is an apocalyptic number.

It is an amenable number.

213425161 is a deficient number, since it is larger than the sum of its proper divisors (1958139).

213425161 is a wasteful number, since it uses less digits than its factorization.

213425161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958138.

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

The square root of 213425161 is about 14609.0780338802. The cubic root of 213425161 is about 597.6063532723.

Adding to 213425161 its reverse (161524312), we get a palindrome (374949473).

It can be divided in two parts, 2134251 and 61, that added together give a palindrome (2134312).

The spelling of 213425161 in words is "two hundred thirteen million, four hundred twenty-five thousand, one hundred sixty-one".