71354431 has 2 divisors, whose sum is σ = 71354432. Its totient is φ = 71354430.

The previous prime is 71354419. The next prime is 71354447. The reversal of 71354431 is 13445317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71354431 - 2¹⁷ = 71223359 is a prime.

It is a super-2 number, since 2×71354431² = 10182909646667522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71354431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71354401) 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 as a sum of consecutive naturals, namely, 35677215 + 35677216.

It is an arithmetic number, because the mean of its divisors is an integer number (35677216).

Almost surely, 2^71354431 is an apocalyptic number.

71354431 is a deficient number, since it is larger than the sum of its proper divisors (1).

71354431 is an equidigital number, since it uses as much as digits as its factorization.

71354431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 71354431 is about 8447.1552016049. The cubic root of 71354431 is about 414.7696616980.

Adding to 71354431 its reverse (13445317), we get a palindrome (84799748).

The spelling of 71354431 in words is "seventy-one million, three hundred fifty-four thousand, four hundred thirty-one".