205215452 has 24 divisors (see below), whose sum is σ = 393313200. Its totient is φ = 93108096.

The previous prime is 205215427. The next prime is 205215487. The reversal of 205215452 is 254512502.

It is a super-2 number, since 2×205215452² = 84226763479128608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30377 + ... + 36512.

It is an arithmetic number, because the mean of its divisors is an integer number (16388050).

Almost surely, 2^205215452 is an apocalyptic number.

It is an amenable number.

205215452 is a deficient number, since it is larger than the sum of its proper divisors (188097748).

205215452 is a wasteful number, since it uses less digits than its factorization.

205215452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66965 (or 66963 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 205215452 is about 14325.3429976388. The cubic root of 205215452 is about 589.8433482414.

Adding to 205215452 its reverse (254512502), we get a palindrome (459727954).

The spelling of 205215452 in words is "two hundred five million, two hundred fifteen thousand, four hundred fifty-two".