71672531 has 16 divisors (see below), whose sum is σ = 85776384. Its totient is φ = 58554144.

The previous prime is 71672521. The next prime is 71672533. The reversal of 71672531 is 13527617.

It is a cyclic number.

It is not a de Polignac number, because 71672531 - 2⁶ = 71672467 is a prime.

It is a super-2 number, since 2×71672531² = 10273903399891922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71672533) 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, 58481 + ... + 59693.

It is an arithmetic number, because the mean of its divisors is an integer number (5361024).

Almost surely, 2^71672531 is an apocalyptic number.

71672531 is a deficient number, since it is larger than the sum of its proper divisors (14103853).

71672531 is a wasteful number, since it uses less digits than its factorization.

71672531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610.

The product of its digits is 8820, while the sum is 32.

The square root of 71672531 is about 8465.9630875642. The cubic root of 71672531 is about 415.3850995448.

The spelling of 71672531 in words is "seventy-one million, six hundred seventy-two thousand, five hundred thirty-one".