201640330 has 32 divisors (see below), whose sum is σ = 372930624. Its totient is φ = 78454656.

The previous prime is 201640289. The next prime is 201640357. The reversal of 201640330 is 33046102.

It is a junction number, because it is equal to n+sod(n) for n = 201640298 and 201640307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120862 + ... + 122518.

It is an arithmetic number, because the mean of its divisors is an integer number (11654082).

Almost surely, 2^201640330 is an apocalyptic number.

201640330 is a deficient number, since it is larger than the sum of its proper divisors (171290294).

201640330 is a wasteful number, since it uses less digits than its factorization.

201640330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 201640330 is about 14200.0116197136. The cubic root of 201640330 is about 586.3979812316.

Adding to 201640330 its reverse (33046102), we get a palindrome (234686432).

The spelling of 201640330 in words is "two hundred one million, six hundred forty thousand, three hundred thirty".