201654321 has 16 divisors (see below), whose sum is σ = 293649408. Its totient is φ = 122075600.

The previous prime is 201654307. The next prime is 201654377. The reversal of 201654321 is 123456102.

It is a cyclic number.

It is not a de Polignac number, because 201654321 - 2¹¹ = 201652273 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201654291 and 201654300.

It is not an unprimeable number, because it can be changed into a prime (201654301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31060 + ... + 36986.

It is an arithmetic number, because the mean of its divisors is an integer number (18353088).

Almost surely, 2^201654321 is an apocalyptic number.

It is an amenable number.

201654321 is a deficient number, since it is larger than the sum of its proper divisors (91995087).

201654321 is a wasteful number, since it uses less digits than its factorization.

201654321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 201654321 is about 14200.5042516102. The cubic root of 201654321 is about 586.4115435059.

The spelling of 201654321 in words is "two hundred one million, six hundred fifty-four thousand, three hundred twenty-one".