213169649 has 12 divisors (see below), whose sum is σ = 270516528. Its totient is φ = 166105800.

The previous prime is 213169643. The next prime is 213169661. The reversal of 213169649 is 946961312.

It is not a de Polignac number, because 213169649 - 2²⁴ = 196392433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213169643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197207 + ... + 198284.

It is an arithmetic number, because the mean of its divisors is an integer number (22543044).

Almost surely, 2^213169649 is an apocalyptic number.

It is an amenable number.

213169649 is a deficient number, since it is larger than the sum of its proper divisors (57346879).

213169649 is a wasteful number, since it uses less digits than its factorization.

213169649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395516 (or 395509 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 213169649 is about 14600.3304414660. The cubic root of 213169649 is about 597.3677738253.

The spelling of 213169649 in words is "two hundred thirteen million, one hundred sixty-nine thousand, six hundred forty-nine".