72281371 has 2 divisors, whose sum is σ = 72281372. Its totient is φ = 72281370.

The previous prime is 72281359. The next prime is 72281413. The reversal of 72281371 is 17318227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72281371 - 2¹⁹ = 71757083 is a prime.

It is not a weakly prime, because it can be changed into another prime (72281351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36140685 + 36140686.

It is an arithmetic number, because the mean of its divisors is an integer number (36140686).

Almost surely, 2^72281371 is an apocalyptic number.

72281371 is a deficient number, since it is larger than the sum of its proper divisors (1).

72281371 is an equidigital number, since it uses as much as digits as its factorization.

72281371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 72281371 is about 8501.8451526713. The cubic root of 72281371 is about 416.5579817505.

Adding to 72281371 its reverse (17318227), we get a palindrome (89599598).

The spelling of 72281371 in words is "seventy-two million, two hundred eighty-one thousand, three hundred seventy-one".