71310051540 has 192 divisors, whose sum is σ = 273050641920. Its totient is φ = 15045626880.

The previous prime is 71310051523. The next prime is 71310051629. The reversal of 71310051540 is 4515001317.

71310051540 is a `hidden beast` number, since 7 + 1 + 3 + 100 + 515 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 676441 + ... + 774720.

It is an arithmetic number, because the mean of its divisors is an integer number (1422138760).

Almost surely, 2^71310051540 is an apocalyptic number.

71310051540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71310051540 is an abundant number, since it is smaller than the sum of its proper divisors (201740590380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71310051540 is a wasteful number, since it uses less digits than its factorization.

71310051540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451199 (or 1451191 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

Adding to 71310051540 its reverse (4515001317), we get a palindrome (75825052857).

The spelling of 71310051540 in words is "seventy-one billion, three hundred ten million, fifty-one thousand, five hundred forty".