71345731 has 16 divisors (see below), whose sum is σ = 75135424. Its totient is φ = 67682304.

The previous prime is 71345723. The next prime is 71345777. The reversal of 71345731 is 13754317.

It is a cyclic number.

It is not a de Polignac number, because 71345731 - 2³ = 71345723 is a prime.

It is a super-3 number, since 3×71345731³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 71345693 and 71345702.

It is not an unprimeable number, because it can be changed into a prime (71345711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369571 + ... + 369763.

It is an arithmetic number, because the mean of its divisors is an integer number (4695964).

Almost surely, 2^71345731 is an apocalyptic number.

71345731 is a deficient number, since it is larger than the sum of its proper divisors (3789693).

71345731 is a wasteful number, since it uses less digits than its factorization.

71345731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 8820, while the sum is 31.

The square root of 71345731 is about 8446.6402196376. The cubic root of 71345731 is about 414.7528038675.

The spelling of 71345731 in words is "seventy-one million, three hundred forty-five thousand, seven hundred thirty-one".