213445601 has 4 divisors (see below), whose sum is σ = 224679600. Its totient is φ = 202211604.

The previous prime is 213445579. The next prime is 213445627. The reversal of 213445601 is 106544312.

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 213445601 - 2²² = 209251297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213445651) 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, 5616971 + ... + 5617008.

It is an arithmetic number, because the mean of its divisors is an integer number (56169900).

Almost surely, 2^213445601 is an apocalyptic number.

It is an amenable number.

213445601 is a deficient number, since it is larger than the sum of its proper divisors (11233999).

213445601 is a wasteful number, since it uses less digits than its factorization.

213445601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11233998.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 213445601 is about 14609.7775821537. Note that the first 3 decimals coincide. The cubic root of 213445601 is about 597.6254305043.

Adding to 213445601 its reverse (106544312), we get a palindrome (319989913).

The spelling of 213445601 in words is "two hundred thirteen million, four hundred forty-five thousand, six hundred one".