9765542221 has 8 divisors (see below), whose sum is σ = 10184486144. Its totient is φ = 9353093760.

The previous prime is 9765542209. The next prime is 9765542251. The reversal of 9765542221 is 1222455679.

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 9765542221 - 2²³ = 9757153613 is a prime.

It is a super-2 number, since 2×9765542221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9765542251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620795 + ... + 1626808.

It is an arithmetic number, because the mean of its divisors is an integer number (1273060768).

Almost surely, 2^9765542221 is an apocalyptic number.

It is an amenable number.

9765542221 is a deficient number, since it is larger than the sum of its proper divisors (418943923).

9765542221 is a wasteful number, since it uses less digits than its factorization.

9765542221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247731.

The product of its digits is 302400, while the sum is 43.

The square root of 9765542221 is about 98820.7580470824. The cubic root of 9765542221 is about 2137.4638938579.

It can be divided in two parts, 97655 and 42221, that added together give a square (139876 = 374²).

The spelling of 9765542221 in words is "nine billion, seven hundred sixty-five million, five hundred forty-two thousand, two hundred twenty-one".