71431005 has 16 divisors (see below), whose sum is σ = 116228160. Its totient is φ = 37450368.

The previous prime is 71430977. The next prime is 71431021. The reversal of 71431005 is 50013417.

It is not a de Polignac number, because 71431005 - 2¹⁵ = 71398237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39472 + ... + 41241.

It is an arithmetic number, because the mean of its divisors is an integer number (7264260).

Almost surely, 2^71431005 is an apocalyptic number.

It is an amenable number.

71431005 is a deficient number, since it is larger than the sum of its proper divisors (44797155).

71431005 is a wasteful number, since it uses less digits than its factorization.

71431005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80780.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 71431005 is about 8451.6865180862. The cubic root of 71431005 is about 414.9179786613.

The spelling of 71431005 in words is "seventy-one million, four hundred thirty-one thousand, five".