213115253 has 12 divisors (see below), whose sum is σ = 236405988. Its totient is φ = 191917440.

The previous prime is 213115241. The next prime is 213115283. The reversal of 213115253 is 352511312.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 91718929 + 121396324 = 9577^2 + 11018^2 .

It is not a de Polignac number, because 213115253 - 2⁴ = 213115237 is a prime.

It is a super-2 number, since 2×213115253² = 90836222122508018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115283) 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, 8450 + ... + 22307.

It is an arithmetic number, because the mean of its divisors is an integer number (19700499).

Almost surely, 2^213115253 is an apocalyptic number.

It is an amenable number.

213115253 is a deficient number, since it is larger than the sum of its proper divisors (23290735).

213115253 is a wasteful number, since it uses less digits than its factorization.

213115253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30824 (or 30811 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 213115253 is about 14598.4674880619. The cubic root of 213115253 is about 597.3169579893.

Adding to 213115253 its reverse (352511312), we get a palindrome (565626565).

The spelling of 213115253 in words is "two hundred thirteen million, one hundred fifteen thousand, two hundred fifty-three".