205142312 has 32 divisors (see below), whose sum is σ = 390186720. Its totient is φ = 101102400.

The previous prime is 205142309. The next prime is 205142321. The reversal of 205142312 is 213241502.

It is a plaindrome in base 13.

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, 247643 + ... + 248469.

It is an arithmetic number, because the mean of its divisors is an integer number (12193335).

Almost surely, 2^205142312 is an apocalyptic number.

It is an amenable number.

205142312 is a deficient number, since it is larger than the sum of its proper divisors (185044408).

205142312 is a wasteful number, since it uses less digits than its factorization.

205142312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 205142312 is about 14322.7899516819. The cubic root of 205142312 is about 589.7732653629.

Adding to 205142312 its reverse (213241502), we get a palindrome (418383814).

The spelling of 205142312 in words is "two hundred five million, one hundred forty-two thousand, three hundred twelve".