71331403 has 16 divisors (see below), whose sum is σ = 86510592. Its totient is φ = 57924000.

The previous prime is 71331397. The next prime is 71331409. The reversal of 71331403 is 30413317.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71331397) and next prime (71331409).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71331403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71331409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3613 + ... + 12478.

It is an arithmetic number, because the mean of its divisors is an integer number (5406912).

Almost surely, 2^71331403 is an apocalyptic number.

71331403 is a deficient number, since it is larger than the sum of its proper divisors (15179189).

71331403 is a wasteful number, since it uses less digits than its factorization.

71331403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16146.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 71331403 is about 8445.7920291705. The cubic root of 71331403 is about 414.7250377772.

The spelling of 71331403 in words is "seventy-one million, three hundred thirty-one thousand, four hundred three".