213043400165 has 16 divisors (see below), whose sum is σ = 269550865920. Its totient is φ = 161198424000.

The previous prime is 213043400159. The next prime is 213043400183. The reversal of 213043400165 is 561004340312.

It is not a de Polignac number, because 213043400165 - 2⁴ = 213043400149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789586 + ... + 1904915.

It is an arithmetic number, because the mean of its divisors is an integer number (16846929120).

Almost surely, 2^213043400165 is an apocalyptic number.

It is an amenable number.

213043400165 is a deficient number, since it is larger than the sum of its proper divisors (56507465755).

213043400165 is a wasteful number, since it uses less digits than its factorization.

213043400165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695132.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 213043400165 its reverse (561004340312), we get a palindrome (774047740477).

The spelling of 213043400165 in words is "two hundred thirteen billion, forty-three million, four hundred thousand, one hundred sixty-five".