213445525 has 24 divisors (see below), whose sum is σ = 282571200. Its totient is φ = 159465600.

The previous prime is 213445513. The next prime is 213445541. The reversal of 213445525 is 525544312.

It is not a de Polignac number, because 213445525 - 2¹³ = 213437333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30561 + ... + 36889.

It is an arithmetic number, because the mean of its divisors is an integer number (11773800).

Almost surely, 2^213445525 is an apocalyptic number.

213445525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213445525 is a deficient number, since it is larger than the sum of its proper divisors (69125675).

213445525 is a wasteful number, since it uses less digits than its factorization.

213445525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429 (or 6424 counting only the distinct ones).

The product of its digits is 24000, while the sum is 31.

The square root of 213445525 is about 14609.7749811556. The cubic root of 213445525 is about 597.6253595736.

Adding to 213445525 its reverse (525544312), we get a palindrome (738989837).

The spelling of 213445525 in words is "two hundred thirteen million, four hundred forty-five thousand, five hundred twenty-five".