71275573 has 2 divisors, whose sum is σ = 71275574. Its totient is φ = 71275572.

The previous prime is 71275537. The next prime is 71275583. The reversal of 71275573 is 37557217.

Together with previous prime (71275537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63888049 + 7387524 = 7993^2 + 2718^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275573 - 2¹³ = 71267381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71275583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35637786 + 35637787.

It is an arithmetic number, because the mean of its divisors is an integer number (35637787).

Almost surely, 2^71275573 is an apocalyptic number.

It is an amenable number.

71275573 is a deficient number, since it is larger than the sum of its proper divisors (1).

71275573 is an equidigital number, since it uses as much as digits as its factorization.

71275573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51450, while the sum is 37.

The square root of 71275573 is about 8442.4861859526. The cubic root of 71275573 is about 414.6168098846.

The spelling of 71275573 in words is "seventy-one million, two hundred seventy-five thousand, five hundred seventy-three".