71506534 has 16 divisors (see below), whose sum is σ = 118494720. Its totient is φ = 32090760.

The previous prime is 71506531. The next prime is 71506537. The reversal of 71506534 is 43560517.

It is an interprime number because it is at equal distance from previous prime (71506531) and next prime (71506537).

It is a super-2 number, since 2×71506534² = 10226368809386312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71506496 and 71506505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71506531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18834 + ... + 22309.

It is an arithmetic number, because the mean of its divisors is an integer number (7405920).

Almost surely, 2^71506534 is an apocalyptic number.

71506534 is a deficient number, since it is larger than the sum of its proper divisors (46988186).

71506534 is a wasteful number, since it uses less digits than its factorization.

71506534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41235.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 71506534 is about 8456.1536173369. The cubic root of 71506534 is about 415.0641677524.

It can be divided in two parts, 71 and 506534, that added together give a palindrome (506605).

The spelling of 71506534 in words is "seventy-one million, five hundred six thousand, five hundred thirty-four".