71244553 has 2 divisors, whose sum is σ = 71244554. Its totient is φ = 71244552.

The previous prime is 71244533. The next prime is 71244577. The reversal of 71244553 is 35544217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 9653449 = 7848^2 + 3107^2 .

It is an emirp because it is prime and its reverse (35544217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71244553 - 2²¹ = 69147401 is a prime.

It is not a weakly prime, because it can be changed into another prime (71244533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35622276 + 35622277.

It is an arithmetic number, because the mean of its divisors is an integer number (35622277).

Almost surely, 2^71244553 is an apocalyptic number.

It is an amenable number.

71244553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71244553 is an equidigital number, since it uses as much as digits as its factorization.

71244553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 71244553 is about 8440.6488494665. The cubic root of 71244553 is about 414.5566523899.

The spelling of 71244553 in words is "seventy-one million, two hundred forty-four thousand, five hundred fifty-three".