213135116525 has 12 divisors (see below), whose sum is σ = 265764016800. Its totient is φ = 169555530480.

The previous prime is 213135116521. The next prime is 213135116543. The reversal of 213135116525 is 525611531312.

It is not a de Polignac number, because 213135116525 - 2² = 213135116521 is a prime.

It is a super-2 number, since 2×213135116525² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213135116521) 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, 23809505 + ... + 23818454.

It is an arithmetic number, because the mean of its divisors is an integer number (22147001400).

Almost surely, 2^213135116525 is an apocalyptic number.

213135116525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213135116525 is a deficient number, since it is larger than the sum of its proper divisors (52628900275).

213135116525 is a wasteful number, since it uses less digits than its factorization.

213135116525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47628148 (or 47628143 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

Adding to 213135116525 its reverse (525611531312), we get a palindrome (738746647837).

The spelling of 213135116525 in words is "two hundred thirteen billion, one hundred thirty-five million, one hundred sixteen thousand, five hundred twenty-five".