71535475251 has 24 divisors (see below), whose sum is σ = 106223187824. Its totient is φ = 46357012800.

The previous prime is 71535475211. The next prime is 71535475303. The reversal of 71535475251 is 15257453517.

71535475251 is a `hidden beast` number, since 7 + 1 + 5 + 3 + 547 + 52 + 51 = 666.

It is not a de Polignac number, because 71535475251 - 2⁹ = 71535474739 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71535475197 and 71535475206.

It is not an unprimeable number, because it can be changed into a prime (71535475211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247785 + ... + 452181.

Almost surely, 2^71535475251 is an apocalyptic number.

71535475251 is a deficient number, since it is larger than the sum of its proper divisors (34687712573).

71535475251 is a wasteful number, since it uses less digits than its factorization.

71535475251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205491 (or 205488 counting only the distinct ones).

The product of its digits is 735000, while the sum is 45.

The spelling of 71535475251 in words is "seventy-one billion, five hundred thirty-five million, four hundred seventy-five thousand, two hundred fifty-one".