71508253 has 2 divisors, whose sum is σ = 71508254. Its totient is φ = 71508252.

The previous prime is 71508233. The next prime is 71508259. The reversal of 71508253 is 35280517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39664804 + 31843449 = 6298^2 + 5643^2 .

It is an emirp because it is prime and its reverse (35280517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71508253 - 2⁹ = 71507741 is a prime.

It is a super-2 number, since 2×71508253² = 10226860494224018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71508259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35754126 + 35754127.

It is an arithmetic number, because the mean of its divisors is an integer number (35754127).

Almost surely, 2^71508253 is an apocalyptic number.

It is an amenable number.

71508253 is a deficient number, since it is larger than the sum of its proper divisors (1).

71508253 is an equidigital number, since it uses as much as digits as its factorization.

71508253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 71508253 is about 8456.2552586828. The cubic root of 71508253 is about 415.0674937402.

The spelling of 71508253 in words is "seventy-one million, five hundred eight thousand, two hundred fifty-three".