205216972 has 12 divisors (see below), whose sum is σ = 367889256. Its totient is φ = 100105760.

The previous prime is 205216969. The next prime is 205216981. The reversal of 205216972 is 279612502.

It is a super-2 number, since 2×205216972² = 84228011193697568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625498 + ... + 625825.

It is an arithmetic number, because the mean of its divisors is an integer number (30657438).

Almost surely, 2^205216972 is an apocalyptic number.

It is an amenable number.

205216972 is a deficient number, since it is larger than the sum of its proper divisors (162672284).

205216972 is a wasteful number, since it uses less digits than its factorization.

205216972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251368 (or 1251366 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 205216972 is about 14325.3960503715. The cubic root of 205216972 is about 589.8448045314.

The spelling of 205216972 in words is "two hundred five million, two hundred sixteen thousand, nine hundred seventy-two".