71131370 has 8 divisors (see below), whose sum is σ = 128036484. Its totient is φ = 28452544.

The previous prime is 71131369. The next prime is 71131397. The reversal of 71131370 is 7313117.

It can be written as a sum of positive squares in 2 ways, for example, as 63218401 + 7912969 = 7951^2 + 2813^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3556559 + ... + 3556578.

Almost surely, 2^71131370 is an apocalyptic number.

71131370 is a deficient number, since it is larger than the sum of its proper divisors (56905114).

71131370 is a wasteful number, since it uses less digits than its factorization.

71131370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7113144.

The product of its (nonzero) digits is 441, while the sum is 23.

The square root of 71131370 is about 8433.9415459203. The cubic root of 71131370 is about 414.3370068987.

Adding to 71131370 its reverse (7313117), we get a palindrome (78444487).

The spelling of 71131370 in words is "seventy-one million, one hundred thirty-one thousand, three hundred seventy".