201421716 has 12 divisors (see below), whose sum is σ = 469984032. Its totient is φ = 67140568.

The previous prime is 201421699. The next prime is 201421723. The reversal of 201421716 is 617124102.

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

It is a congruent number.

It is an unprimeable number.

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, 8392560 + ... + 8392583.

It is an arithmetic number, because the mean of its divisors is an integer number (39165336).

Almost surely, 2^201421716 is an apocalyptic number.

It is an amenable number.

201421716 is an abundant number, since it is smaller than the sum of its proper divisors (268562316).

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

201421716 is a wasteful number, since it uses less digits than its factorization.

201421716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785150 (or 16785148 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 201421716 is about 14192.3118624134. The cubic root of 201421716 is about 586.1859846783.

Adding to 201421716 its reverse (617124102), we get a palindrome (818545818).

The spelling of 201421716 in words is "two hundred one million, four hundred twenty-one thousand, seven hundred sixteen".