82150749 has 12 divisors (see below), whose sum is σ = 125642556. Its totient is φ = 51545472.

The previous prime is 82150741. The next prime is 82150751. The reversal of 82150749 is 94705128.

It can be written as a sum of positive squares in 2 ways, for example, as 59397849 + 22752900 = 7707^2 + 4770^2 .

It is not a de Polignac number, because 82150749 - 2³ = 82150741 is a prime.

It is a super-2 number, since 2×82150749² = 13497491122522002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82150741) 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, 268314 + ... + 268619.

It is an arithmetic number, because the mean of its divisors is an integer number (10470213).

Almost surely, 2^82150749 is an apocalyptic number.

It is an amenable number.

82150749 is a deficient number, since it is larger than the sum of its proper divisors (43491807).

82150749 is a wasteful number, since it uses less digits than its factorization.

82150749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536956 (or 536953 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 82150749 is about 9063.7050371247. The cubic root of 82150749 is about 434.7142157759.

The spelling of 82150749 in words is "eighty-two million, one hundred fifty thousand, seven hundred forty-nine".