213535122025 has 6 divisors (see below), whose sum is σ = 264783551342. Its totient is φ = 170828097600.

The previous prime is 213535122011. The next prime is 213535122037. The reversal of 213535122025 is 520221535312.

It can be written as a sum of positive squares in 3 ways, for example, as 1187422681 + 212347699344 = 34459^2 + 460812^2 .

It is not a de Polignac number, because 213535122025 - 2¹¹ = 213535119977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4270702416 + ... + 4270702465.

Almost surely, 2^213535122025 is an apocalyptic number.

213535122025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213535122025 is a deficient number, since it is larger than the sum of its proper divisors (51248429317).

213535122025 is an equidigital number, since it uses as much as digits as its factorization.

213535122025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541404891 (or 8541404886 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 213535122025 its reverse (520221535312), we get a palindrome (733756657337).

The spelling of 213535122025 in words is "two hundred thirteen billion, five hundred thirty-five million, one hundred twenty-two thousand, twenty-five".