71538651 has 12 divisors (see below), whose sum is σ = 103410528. Its totient is φ = 47656944.

The previous prime is 71538641. The next prime is 71538659. The reversal of 71538651 is 15683517.

71538651 is a `hidden beast` number, since 71 + 538 + 6 + 51 = 666.

It is not a de Polignac number, because 71538651 - 2⁹ = 71538139 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (71538659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16641 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (8617544).

Almost surely, 2^71538651 is an apocalyptic number.

71538651 is a deficient number, since it is larger than the sum of its proper divisors (31871877).

71538651 is a wasteful number, since it uses less digits than its factorization.

71538651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5922 (or 5919 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 71538651 is about 8458.0524354014. The cubic root of 71538651 is about 415.1263001656.

The spelling of 71538651 in words is "seventy-one million, five hundred thirty-eight thousand, six hundred fifty-one".