201331764 has 48 divisors (see below), whose sum is σ = 522849600. Its totient is φ = 66997728.

The previous prime is 201331751. The next prime is 201331783. The reversal of 201331764 is 467133102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 84907 + ... + 87245.

It is an arithmetic number, because the mean of its divisors is an integer number (10892700).

Almost surely, 2^201331764 is an apocalyptic number.

It is an amenable number.

201331764 is an abundant number, since it is smaller than the sum of its proper divisors (321517836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201331764 is a wasteful number, since it uses less digits than its factorization.

201331764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149 (or 3141 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 201331764 is about 14189.1424688034. The cubic root of 201331764 is about 586.0987109822.

Adding to 201331764 its reverse (467133102), we get a palindrome (668464866).

The spelling of 201331764 in words is "two hundred one million, three hundred thirty-one thousand, seven hundred sixty-four".