71673531 has 8 divisors (see below), whose sum is σ = 95607360. Its totient is φ = 47761032.

The previous prime is 71673523. The next prime is 71673583. The reversal of 71673531 is 13537617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71673531 - 2³ = 71673523 is a prime.

It is a super-2 number, since 2×71673531² = 10274190092015922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71673492 and 71673501.

It is not an unprimeable number, because it can be changed into a prime (71673521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5880 + ... + 13338.

It is an arithmetic number, because the mean of its divisors is an integer number (11950920).

Almost surely, 2^71673531 is an apocalyptic number.

71673531 is a deficient number, since it is larger than the sum of its proper divisors (23933829).

71673531 is a wasteful number, since it uses less digits than its factorization.

71673531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665.

The product of its digits is 13230, while the sum is 33.

The square root of 71673531 is about 8466.0221473842. The cubic root of 71673531 is about 415.3870314015.

It can be divided in two parts, 716 and 73531, that added together give a palindrome (74247).

The spelling of 71673531 in words is "seventy-one million, six hundred seventy-three thousand, five hundred thirty-one".