83521225 has 6 divisors (see below), whose sum is σ = 103566350. Its totient is φ = 66816960.

The previous prime is 83521219. The next prime is 83521231. The reversal of 83521225 is 52212538.

It is an interprime number because it is at equal distance from previous prime (83521219) and next prime (83521231).

It can be written as a sum of positive squares in 3 ways, for example, as 2862864 + 80658361 = 1692^2 + 8981^2 .

It is not a de Polignac number, because 83521225 - 2¹⁹ = 82996937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83521193 and 83521202.

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, 1670400 + ... + 1670449.

Almost surely, 2^83521225 is an apocalyptic number.

It is an amenable number.

83521225 is a deficient number, since it is larger than the sum of its proper divisors (20045125).

83521225 is a wasteful number, since it uses less digits than its factorization.

83521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340859 (or 3340854 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 83521225 is about 9138.9947477827. The cubic root of 83521225 is about 437.1182629337.

It can be divided in two parts, 83521 and 225, that multiplied together give a square (18792225 = 4335²).

The spelling of 83521225 in words is "eighty-three million, five hundred twenty-one thousand, two hundred twenty-five".