71503031451 has 4 divisors (see below), whose sum is σ = 95337375272. Its totient is φ = 47668687632.

The previous prime is 71503031449. The next prime is 71503031459. The reversal of 71503031451 is 15413030517.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71503031451 - 2¹ = 71503031449 is a prime.

It is a super-2 number, since 2×71503031451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71503031459) 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 3 ways as a sum of consecutive naturals, for example, 11917171906 + ... + 11917171911.

It is an arithmetic number, because the mean of its divisors is an integer number (23834343818).

Almost surely, 2^71503031451 is an apocalyptic number.

71503031451 is a deficient number, since it is larger than the sum of its proper divisors (23834343821).

71503031451 is a wasteful number, since it uses less digits than its factorization.

71503031451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23834343820.

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 71503031451 its reverse (15413030517), we get a palindrome (86916061968).

The spelling of 71503031451 in words is "seventy-one billion, five hundred three million, thirty-one thousand, four hundred fifty-one".