71288251 has 8 divisors (see below), whose sum is σ = 73703808. Its totient is φ = 68880000.

The previous prime is 71288153. The next prime is 71288263. The reversal of 71288251 is 15288217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71288251 - 2⁹ = 71287739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71282251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24051 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (9212976).

Almost surely, 2^71288251 is an apocalyptic number.

71288251 is a deficient number, since it is larger than the sum of its proper divisors (2415557).

71288251 is a wasteful number, since it uses less digits than its factorization.

71288251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3653.

The product of its digits is 8960, while the sum is 34.

The square root of 71288251 is about 8443.2369977397. The cubic root of 71288251 is about 414.6413914724.

Subtracting from 71288251 its sum of digits (34), we obtain a palindrome (71288217).

The spelling of 71288251 in words is "seventy-one million, two hundred eighty-eight thousand, two hundred fifty-one".