82155474 has 12 divisors (see below), whose sum is σ = 178003566. Its totient is φ = 27385152.

The previous prime is 82155461. The next prime is 82155511. The reversal of 82155474 is 47455128.

It can be written as a sum of positive squares in only one way, i.e., 46335249 + 35820225 = 6807^2 + 5985^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2282079 + ... + 2282114.

Almost surely, 2^82155474 is an apocalyptic number.

82155474 is an abundant number, since it is smaller than the sum of its proper divisors (95848092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82155474 is a wasteful number, since it uses less digits than its factorization.

82155474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564201 (or 4564198 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 82155474 is about 9063.9656883728. The cubic root of 82155474 is about 434.7225499879.

It can be divided in two parts, 8215 and 5474, that added together give a square (13689 = 117²).

The spelling of 82155474 in words is "eighty-two million, one hundred fifty-five thousand, four hundred seventy-four".