213043400166 has 16 divisors (see below), whose sum is σ = 431923606704. Its totient is φ = 70041665664.

The previous prime is 213043400159. The next prime is 213043400183. The reversal of 213043400166 is 661004340312.

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 7 ways as a sum of consecutive naturals, for example, 243199791 + ... + 243200666.

It is an arithmetic number, because the mean of its divisors is an integer number (26995225419).

Almost surely, 2^213043400166 is an apocalyptic number.

213043400166 is an abundant number, since it is smaller than the sum of its proper divisors (218880206538).

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

213043400166 is a wasteful number, since it uses less digits than its factorization.

213043400166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486400535.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 213043400166 its reverse (661004340312), we get a palindrome (874047740478).

The spelling of 213043400166 in words is "two hundred thirteen billion, forty-three million, four hundred thousand, one hundred sixty-six".