213120525 has 24 divisors (see below), whose sum is σ = 353530944. Its totient is φ = 113286400.

The previous prime is 213120491. The next prime is 213120527. The reversal of 213120525 is 525021312.

It is not a de Polignac number, because 213120525 - 2⁸ = 213120269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213120527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18757 + ... + 27893.

It is an arithmetic number, because the mean of its divisors is an integer number (14730456).

Almost surely, 2^213120525 is an apocalyptic number.

213120525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213120525 is a deficient number, since it is larger than the sum of its proper divisors (140410419).

213120525 is a wasteful number, since it uses less digits than its factorization.

213120525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461 (or 9456 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 213120525 is about 14598.6480538439. The cubic root of 213120525 is about 597.3218833822.

Adding to 213120525 its reverse (525021312), we get a palindrome (738141837).

The spelling of 213120525 in words is "two hundred thirteen million, one hundred twenty thousand, five hundred twenty-five".