1652565221 has 8 divisors (see below), whose sum is σ = 1663004640. Its totient is φ = 1642153968.

The previous prime is 1652565209. The next prime is 1652565227. The reversal of 1652565221 is 1225652561.

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

It is a cyclic number.

It is not a de Polignac number, because 1652565221 - 2¹⁸ = 1652303077 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 (1652565227) 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 7 ways as a sum of consecutive naturals, for example, 117515 + ... + 130823.

It is an arithmetic number, because the mean of its divisors is an integer number (207875580).

Almost surely, 2^1652565221 is an apocalyptic number.

It is an amenable number.

1652565221 is a deficient number, since it is larger than the sum of its proper divisors (10439419).

1652565221 is a wasteful number, since it uses less digits than its factorization.

1652565221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083.

The product of its digits is 36000, while the sum is 35.

The square root of 1652565221 is about 40651.7554479508. The cubic root of 1652565221 is about 1182.2778038590.

The spelling of 1652565221 in words is "one billion, six hundred fifty-two million, five hundred sixty-five thousand, two hundred twenty-one".