201521466 has 32 divisors (see below), whose sum is σ = 448372800. Its totient is φ = 67091760.

The previous prime is 201521459. The next prime is 201521471. The reversal of 201521466 is 664125102.

It is a super-2 number, since 2×201521466² = 81221802517578312, which contains 22 as substring.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55981 + ... + 59471.

It is an arithmetic number, because the mean of its divisors is an integer number (14011650).

Almost surely, 2^201521466 is an apocalyptic number.

201521466 is an abundant number, since it is smaller than the sum of its proper divisors (246851334).

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

201521466 is a wasteful number, since it uses less digits than its factorization.

201521466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 201521466 is about 14195.8256540435. The cubic root of 201521466 is about 586.2827342633.

Adding to 201521466 its reverse (664125102), we get a palindrome (865646568).

The spelling of 201521466 in words is "two hundred one million, five hundred twenty-one thousand, four hundred sixty-six".