202071621 has 4 divisors (see below), whose sum is σ = 269428832. Its totient is φ = 134714412.

The previous prime is 202071619. The next prime is 202071641. The reversal of 202071621 is 126170202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 202071621 - 2¹ = 202071619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202071641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33678601 + ... + 33678606.

It is an arithmetic number, because the mean of its divisors is an integer number (67357208).

Almost surely, 2^202071621 is an apocalyptic number.

It is an amenable number.

202071621 is a deficient number, since it is larger than the sum of its proper divisors (67357211).

202071621 is an equidigital number, since it uses as much as digits as its factorization.

202071621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67357210.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 202071621 is about 14215.1897982405. The cubic root of 202071621 is about 586.8157681388.

The spelling of 202071621 in words is "two hundred two million, seventy-one thousand, six hundred twenty-one".