32320381 has 2 divisors, whose sum is σ = 32320382. Its totient is φ = 32320380.

The previous prime is 32320363. The next prime is 32320399. The reversal of 32320381 is 18302323.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (32320363) and next prime (32320399).

It can be written as a sum of positive squares in only one way, i.e., 32319225 + 1156 = 5685^2 + 34^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32320381 is a prime.

It is a super-2 number, since 2×32320381² = 2089214055970322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32320361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16160190 + 16160191.

It is an arithmetic number, because the mean of its divisors is an integer number (16160191).

Almost surely, 2^32320381 is an apocalyptic number.

It is an amenable number.

32320381 is a deficient number, since it is larger than the sum of its proper divisors (1).

32320381 is an equidigital number, since it uses as much as digits as its factorization.

32320381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 32320381 is about 5685.1016701551. The cubic root of 32320381 is about 318.5362213356.

The spelling of 32320381 in words is "thirty-two million, three hundred twenty thousand, three hundred eighty-one".