201993284 has 6 divisors (see below), whose sum is σ = 353488254. Its totient is φ = 100996640.

The previous prime is 201993257. The next prime is 201993289. The reversal of 201993284 is 482399102.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 58951684 = 11960^2 + 7678^2 .

It is a super-2 number, since 2×201993284² = 81602573562209312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201993289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25249157 + ... + 25249164.

It is an arithmetic number, because the mean of its divisors is an integer number (58914709).

Almost surely, 2^201993284 is an apocalyptic number.

It is an amenable number.

201993284 is a deficient number, since it is larger than the sum of its proper divisors (151494970).

201993284 is a wasteful number, since it uses less digits than its factorization.

201993284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50498325 (or 50498323 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 201993284 is about 14212.4341335325. The cubic root of 201993284 is about 586.7399281500.

The spelling of 201993284 in words is "two hundred one million, nine hundred ninety-three thousand, two hundred eighty-four".