71211497 has 4 divisors (see below), whose sum is σ = 81384576. Its totient is φ = 61038420.

The previous prime is 71211467. The next prime is 71211499. The reversal of 71211497 is 79411217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71211497 - 2¹⁰ = 71210473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71211499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5086529 + ... + 5086542.

It is an arithmetic number, because the mean of its divisors is an integer number (20346144).

Almost surely, 2^71211497 is an apocalyptic number.

It is an amenable number.

71211497 is a deficient number, since it is larger than the sum of its proper divisors (10173079).

71211497 is a wasteful number, since it uses less digits than its factorization.

71211497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10173078.

The product of its digits is 3528, while the sum is 32.

The square root of 71211497 is about 8438.6904789784. The cubic root of 71211497 is about 414.4925272320.

The spelling of 71211497 in words is "seventy-one million, two hundred eleven thousand, four hundred ninety-seven".