71513503 has 2 divisors, whose sum is σ = 71513504. Its totient is φ = 71513502.

The previous prime is 71513459. The next prime is 71513521. The reversal of 71513503 is 30531517.

It is a strong prime.

It is an emirp because it is prime and its reverse (30531517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71513503 - 2¹⁷ = 71382431 is a prime.

It is a super-2 number, since 2×71513503² = 10228362222662018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71513303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756751 + 35756752.

It is an arithmetic number, because the mean of its divisors is an integer number (35756752).

Almost surely, 2^71513503 is an apocalyptic number.

71513503 is a deficient number, since it is larger than the sum of its proper divisors (1).

71513503 is an equidigital number, since it uses as much as digits as its factorization.

71513503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 71513503 is about 8456.5656740783. The cubic root of 71513503 is about 415.0776513137.

The spelling of 71513503 in words is "seventy-one million, five hundred thirteen thousand, five hundred three".