71000431 has 4 divisors (see below), whose sum is σ = 71087112. Its totient is φ = 70913752.

The previous prime is 71000429. The next prime is 71000453. The reversal of 71000431 is 13400017.

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

It is a cyclic number.

It is not a de Polignac number, because 71000431 - 2¹ = 71000429 is a prime.

It is a super-2 number, since 2×71000431² = 10082122404371522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71000731) 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, 42100 + ... + 43753.

It is an arithmetic number, because the mean of its divisors is an integer number (17771778).

Almost surely, 2^71000431 is an apocalyptic number.

71000431 is a deficient number, since it is larger than the sum of its proper divisors (86681).

71000431 is an equidigital number, since it uses as much as digits as its factorization.

71000431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86680.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71000431 is about 8426.1753482823. The cubic root of 71000431 is about 414.0826128244.

Adding to 71000431 its reverse (13400017), we get a palindrome (84400448).

The spelling of 71000431 in words is "seventy-one million, four hundred thirty-one", and thus it is an aban number.