201421524 has 12 divisors (see below), whose sum is σ = 469983584. Its totient is φ = 67140504.

The previous prime is 201421499. The next prime is 201421529. The reversal of 201421524 is 425124102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 201421524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201421529) 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 in 3 ways as a sum of consecutive naturals, for example, 8392552 + ... + 8392575.

Almost surely, 2^201421524 is an apocalyptic number.

It is an amenable number.

201421524 is an abundant number, since it is smaller than the sum of its proper divisors (268562060).

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

201421524 is a wasteful number, since it uses less digits than its factorization.

201421524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785134 (or 16785132 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 201421524 is about 14192.3050981861. The cubic root of 201421524 is about 586.1857984228.

Adding to 201421524 its reverse (425124102), we get a palindrome (626545626).

The spelling of 201421524 in words is "two hundred one million, four hundred twenty-one thousand, five hundred twenty-four".