82157745 has 16 divisors (see below), whose sum is σ = 133416000. Its totient is φ = 43162944.

The previous prime is 82157737. The next prime is 82157773. The reversal of 82157745 is 54775128.

It is not a de Polignac number, because 82157745 - 2³ = 82157737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39870 + ... + 41879.

It is an arithmetic number, because the mean of its divisors is an integer number (8338500).

Almost surely, 2^82157745 is an apocalyptic number.

It is an amenable number.

82157745 is a deficient number, since it is larger than the sum of its proper divisors (51258255).

82157745 is a wasteful number, since it uses less digits than its factorization.

82157745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81824.

The product of its digits is 78400, while the sum is 39.

The square root of 82157745 is about 9064.0909637977. The cubic root of 82157745 is about 434.7265555876.

The spelling of 82157745 in words is "eighty-two million, one hundred fifty-seven thousand, seven hundred forty-five".