32330021561 has 4 divisors (see below), whose sum is σ = 32483244624. Its totient is φ = 32176798500.

The previous prime is 32330021557. The next prime is 32330021569. The reversal of 32330021561 is 16512003323.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16512003323 = 2957 ⋅5584039.

It is a cyclic number.

It is not a de Polignac number, because 32330021561 - 2² = 32330021557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32330021561.

It is not an unprimeable number, because it can be changed into a prime (32330021569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76611215 + ... + 76611636.

It is an arithmetic number, because the mean of its divisors is an integer number (8120811156).

Almost surely, 2^32330021561 is an apocalyptic number.

It is an amenable number.

32330021561 is a deficient number, since it is larger than the sum of its proper divisors (153223063).

32330021561 is a wasteful number, since it uses less digits than its factorization.

32330021561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153223062.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 32330021561 its reverse (16512003323), we get a palindrome (48842024884).

The spelling of 32330021561 in words is "thirty-two billion, three hundred thirty million, twenty-one thousand, five hundred sixty-one".