213524425 has 6 divisors (see below), whose sum is σ = 264770318. Its totient is φ = 170819520.

The previous prime is 213524407. The next prime is 213524429. The reversal of 213524425 is 524425312.

It can be written as a sum of positive squares in 3 ways, for example, as 23001616 + 190522809 = 4796^2 + 13803^2 .

It is not a de Polignac number, because 213524425 - 2¹¹ = 213522377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213524393 and 213524402.

It is not an unprimeable number, because it can be changed into a prime (213524429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4270464 + ... + 4270513.

Almost surely, 2^213524425 is an apocalyptic number.

213524425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213524425 is a deficient number, since it is larger than the sum of its proper divisors (51245893).

213524425 is an equidigital number, since it uses as much as digits as its factorization.

213524425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540987 (or 8540982 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 213524425 is about 14612.4749785928. The cubic root of 213524425 is about 597.6989877778.

Adding to 213524425 its reverse (524425312), we get a palindrome (737949737).

The spelling of 213524425 in words is "two hundred thirteen million, five hundred twenty-four thousand, four hundred twenty-five".