82159551 has 12 divisors (see below), whose sum is σ = 119170480. Its totient is φ = 54544320.

The previous prime is 82159543. The next prime is 82159631. The reversal of 82159551 is 15595128.

It is a happy number.

It is not a de Polignac number, because 82159551 - 2³ = 82159543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82179551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16771 + ... + 21108.

Almost surely, 2^82159551 is an apocalyptic number.

82159551 is a deficient number, since it is larger than the sum of its proper divisors (37010929).

82159551 is a wasteful number, since it uses less digits than its factorization.

82159551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38126 (or 38123 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 82159551 is about 9064.1905871401. The cubic root of 82159551 is about 434.7297409655.

It can be divided in two parts, 8215 and 9551, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 82159551 in words is "eighty-two million, one hundred fifty-nine thousand, five hundred fifty-one".