71373251 has 4 divisors (see below), whose sum is σ = 73114104. Its totient is φ = 69632400.

The previous prime is 71373229. The next prime is 71373257. The reversal of 71373251 is 15237317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71373251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71373257) 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, 870365 + ... + 870446.

It is an arithmetic number, because the mean of its divisors is an integer number (18278526).

Almost surely, 2^71373251 is an apocalyptic number.

71373251 is a deficient number, since it is larger than the sum of its proper divisors (1740853).

71373251 is a wasteful number, since it uses less digits than its factorization.

71373251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740852.

The product of its digits is 4410, while the sum is 29.

The square root of 71373251 is about 8448.2691126644. The cubic root of 71373251 is about 414.8061241795.

The spelling of 71373251 in words is "seventy-one million, three hundred seventy-three thousand, two hundred fifty-one".