253205211 has 16 divisors (see below), whose sum is σ = 389817344. Its totient is φ = 143195904.

The previous prime is 253205207. The next prime is 253205231. The reversal of 253205211 is 112502352.

It is not a de Polignac number, because 253205211 - 2² = 253205207 is a prime.

It is a super-2 number, since 2×253205211² = 128225757755109042, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (253205231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60115 + ... + 64188.

It is an arithmetic number, because the mean of its divisors is an integer number (24363584).

Almost surely, 2^253205211 is an apocalyptic number.

253205211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

253205211 is a deficient number, since it is larger than the sum of its proper divisors (136612133).

253205211 is a wasteful number, since it uses less digits than its factorization.

253205211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124410.

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

The square root of 253205211 is about 15912.4231655647. The cubic root of 253205211 is about 632.6413092803.

Adding to 253205211 its reverse (112502352), we get a palindrome (365707563).

The spelling of 253205211 in words is "two hundred fifty-three million, two hundred five thousand, two hundred eleven".