32273999981 has 2 divisors, whose sum is σ = 32273999982. Its totient is φ = 32273999980.

The previous prime is 32273999951. The next prime is 32274000029. The reversal of 32273999981 is 18999937223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23025331081 + 9248668900 = 151741^2 + 96170^2 .

It is a cyclic number.

It is not a de Polignac number, because 32273999981 - 2¹⁰ = 32273998957 is a prime.

It is a super-2 number, since 2×32273999981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32273999951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16136999990 + 16136999991.

It is an arithmetic number, because the mean of its divisors is an integer number (16136999991).

Almost surely, 2^32273999981 is an apocalyptic number.

It is an amenable number.

32273999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32273999981 is an equidigital number, since it uses as much as digits as its factorization.

32273999981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 62.

The spelling of 32273999981 in words is "thirty-two billion, two hundred seventy-three million, nine hundred ninety-nine thousand, nine hundred eighty-one".