961529221 has 8 divisors (see below), whose sum is σ = 971986400. Its totient is φ = 951102000.

The previous prime is 961529213. The next prime is 961529251. The reversal of 961529221 is 122925169.

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 961529221 - 2³ = 961529213 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 (961529251) 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, 60346 + ... + 74596.

It is an arithmetic number, because the mean of its divisors is an integer number (121498300).

Almost surely, 2^961529221 is an apocalyptic number.

It is an amenable number.

961529221 is a deficient number, since it is larger than the sum of its proper divisors (10457179).

961529221 is a wasteful number, since it uses less digits than its factorization.

961529221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14979.

The product of its digits is 19440, while the sum is 37.

The square root of 961529221 is about 31008.5346477385. The cubic root of 961529221 is about 987.0083550846.

The spelling of 961529221 in words is "nine hundred sixty-one million, five hundred twenty-nine thousand, two hundred twenty-one".