71916525 has 24 divisors (see below), whose sum is σ = 132114560. Its totient is φ = 38355120.

The previous prime is 71916521. The next prime is 71916529. The reversal of 71916525 is 52561917.

It is an interprime number because it is at equal distance from previous prime (71916521) and next prime (71916529).

It is not a de Polignac number, because 71916525 - 2² = 71916521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71916525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71916521) 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, 52597 + ... + 53946.

Almost surely, 2^71916525 is an apocalyptic number.

71916525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71916525 is a deficient number, since it is larger than the sum of its proper divisors (60198035).

71916525 is a wasteful number, since it uses less digits than its factorization.

71916525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106562 (or 106551 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 71916525 is about 8480.3611361781. The cubic root of 71916525 is about 415.8559292927.

The spelling of 71916525 in words is "seventy-one million, nine hundred sixteen thousand, five hundred twenty-five".