71723151 has 24 divisors (see below), whose sum is σ = 109483920. Its totient is φ = 46904832.

The previous prime is 71723117. The next prime is 71723159. The reversal of 71723151 is 15132717.

It is a happy number.

It is not a de Polignac number, because 71723151 - 2¹¹ = 71721103 is a prime.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71723159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10095 + ... + 15663.

It is an arithmetic number, because the mean of its divisors is an integer number (4561830).

Almost surely, 2^71723151 is an apocalyptic number.

71723151 is a deficient number, since it is larger than the sum of its proper divisors (37760769).

71723151 is an equidigital number, since it uses as much as digits as its factorization.

71723151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637 (or 5625 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 71723151 is about 8468.9521783985. The cubic root of 71723151 is about 415.4828675702.

Adding to 71723151 its reverse (15132717), we get a palindrome (86855868).

The spelling of 71723151 in words is "seventy-one million, seven hundred twenty-three thousand, one hundred fifty-one".