83557225 has 12 divisors (see below), whose sum is σ = 103798044. Its totient is φ = 66725120.

The previous prime is 83557189. The next prime is 83557267. The reversal of 83557225 is 52275538.

It can be written as a sum of positive squares in 6 ways, for example, as 34445161 + 49112064 = 5869^2 + 7008^2 .

It is not a de Polignac number, because 83557225 - 2¹⁵ = 83524457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12717 + ... + 18133.

It is an arithmetic number, because the mean of its divisors is an integer number (8649837).

Almost surely, 2^83557225 is an apocalyptic number.

It is an amenable number.

83557225 is a deficient number, since it is larger than the sum of its proper divisors (20240819).

83557225 is a wasteful number, since it uses less digits than its factorization.

83557225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044 (or 6039 counting only the distinct ones).

The product of its digits is 84000, while the sum is 37.

The square root of 83557225 is about 9140.9641176410. The cubic root of 83557225 is about 437.1810573395.

The spelling of 83557225 in words is "eighty-three million, five hundred fifty-seven thousand, two hundred twenty-five".