71502253 has 2 divisors, whose sum is σ = 71502254. Its totient is φ = 71502252.

The previous prime is 71502229. The next prime is 71502271. The reversal of 71502253 is 35220517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69856164 + 1646089 = 8358^2 + 1283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71502253 is a prime.

It is a super-2 number, since 2×71502253² = 10225144368152018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71502853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35751126 + 35751127.

It is an arithmetic number, because the mean of its divisors is an integer number (35751127).

Almost surely, 2^71502253 is an apocalyptic number.

It is an amenable number.

71502253 is a deficient number, since it is larger than the sum of its proper divisors (1).

71502253 is an equidigital number, since it uses as much as digits as its factorization.

71502253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 71502253 is about 8455.9004842772. The cubic root of 71502253 is about 415.0558844759.

The spelling of 71502253 in words is "seventy-one million, five hundred two thousand, two hundred fifty-three".