32745291221 has 2 divisors, whose sum is σ = 32745291222. Its totient is φ = 32745291220.

The previous prime is 32745291211. The next prime is 32745291259. The reversal of 32745291221 is 12219254723.

It is an a-pointer prime, because the next prime (32745291259) can be obtained adding 32745291221 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26443312996 + 6301978225 = 162614^2 + 79385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32745291221 is a prime.

It is a super-3 number, since 3×32745291221³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32745291211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16372645610 + 16372645611.

It is an arithmetic number, because the mean of its divisors is an integer number (16372645611).

Almost surely, 2^32745291221 is an apocalyptic number.

It is an amenable number.

32745291221 is a deficient number, since it is larger than the sum of its proper divisors (1).

32745291221 is an equidigital number, since it uses as much as digits as its factorization.

32745291221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The spelling of 32745291221 in words is "thirty-two billion, seven hundred forty-five million, two hundred ninety-one thousand, two hundred twenty-one".