201520064 has 14 divisors (see below), whose sum is σ = 399891504. Its totient is φ = 100760000.

The previous prime is 201520063. The next prime is 201520087. The reversal of 201520064 is 460025102.

It is a happy number.

It is a super-2 number, since 2×201520064² = 81220672389128192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201520063) 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 as a sum of consecutive naturals, namely, 1574312 + ... + 1574439.

Almost surely, 2^201520064 is an apocalyptic number.

It is an amenable number.

201520064 is a deficient number, since it is larger than the sum of its proper divisors (198371440).

201520064 is an equidigital number, since it uses as much as digits as its factorization.

201520064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148763 (or 3148753 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 201520064 is about 14195.7762732441. The cubic root of 201520064 is about 586.2813746558.

Adding to 201520064 its reverse (460025102), we get a palindrome (661545166).

The spelling of 201520064 in words is "two hundred one million, five hundred twenty thousand, sixty-four".