201521414 has 8 divisors (see below), whose sum is σ = 302569680. Its totient is φ = 100664856.

The previous prime is 201521413. The next prime is 201521431. The reversal of 201521414 is 414125102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×201521414² = 81221760601118792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201521413) 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, 45269 + ... + 49520.

It is an arithmetic number, because the mean of its divisors is an integer number (37821210).

Almost surely, 2^201521414 is an apocalyptic number.

201521414 is a deficient number, since it is larger than the sum of its proper divisors (101048266).

201521414 is a wasteful number, since it uses less digits than its factorization.

201521414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95854.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 201521414 is about 14195.8238225191. The cubic root of 201521414 is about 586.2826838357.

Adding to 201521414 its reverse (414125102), we get a palindrome (615646516).

The spelling of 201521414 in words is "two hundred one million, five hundred twenty-one thousand, four hundred fourteen".