71445553 has 2 divisors, whose sum is σ = 71445554. Its totient is φ = 71445552.

The previous prime is 71445547. The next prime is 71445559. The reversal of 71445553 is 35554417.

It is a balanced prime because it is at equal distance from previous prime (71445547) and next prime (71445559).

It can be written as a sum of positive squares in only one way, i.e., 48902049 + 22543504 = 6993^2 + 4748^2 .

It is an emirp because it is prime and its reverse (35554417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71445553 - 2²¹ = 69348401 is a prime.

It is not a weakly prime, because it can be changed into another prime (71445559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35722776 + 35722777.

It is an arithmetic number, because the mean of its divisors is an integer number (35722777).

Almost surely, 2^71445553 is an apocalyptic number.

It is an amenable number.

71445553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71445553 is an equidigital number, since it uses as much as digits as its factorization.

71445553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 34.

The square root of 71445553 is about 8452.5471308949. The cubic root of 71445553 is about 414.9461448477.

The spelling of 71445553 in words is "seventy-one million, four hundred forty-five thousand, five hundred fifty-three".