71534531 has 8 divisors (see below), whose sum is σ = 74729760. Its totient is φ = 68346432.

The previous prime is 71534501. The next prime is 71534549. The reversal of 71534531 is 13543517.

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

It is not a de Polignac number, because 71534531 - 2¹⁸ = 71272387 is a prime.

It is a super-2 number, since 2×71534531² = 10234378250779922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71534494 and 71534503.

It is not an unprimeable number, because it can be changed into a prime (71534501) 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, 36041 + ... + 37973.

It is an arithmetic number, because the mean of its divisors is an integer number (9341220).

Almost surely, 2^71534531 is an apocalyptic number.

71534531 is a deficient number, since it is larger than the sum of its proper divisors (3195229).

71534531 is a wasteful number, since it uses less digits than its factorization.

71534531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565.

The product of its digits is 6300, while the sum is 29.

The square root of 71534531 is about 8457.8088770083. The cubic root of 71534531 is about 415.1183307991.

The spelling of 71534531 in words is "seventy-one million, five hundred thirty-four thousand, five hundred thirty-one".