201661324 has 12 divisors (see below), whose sum is σ = 364291648. Its totient is φ = 97578000.

The previous prime is 201661321. The next prime is 201661333. The reversal of 201661324 is 423166102.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (201661321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813027 + ... + 813274.

Almost surely, 2^201661324 is an apocalyptic number.

It is an amenable number.

201661324 is a deficient number, since it is larger than the sum of its proper divisors (162630324).

201661324 is a wasteful number, since it uses less digits than its factorization.

201661324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626336 (or 1626334 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 201661324 is about 14200.7508252205. The cubic root of 201661324 is about 586.4183316777.

The spelling of 201661324 in words is "two hundred one million, six hundred sixty-one thousand, three hundred twenty-four".