85181225 has 12 divisors (see below), whose sum is σ = 106183680. Its totient is φ = 67784400.

The previous prime is 85181219. The next prime is 85181251. The reversal of 85181225 is 52218158.

It is a happy number.

It is not a de Polignac number, because 85181225 - 2¹² = 85177129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85181191 and 85181200.

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, 4145 + ... + 13694.

It is an arithmetic number, because the mean of its divisors is an integer number (8848640).

Almost surely, 2^85181225 is an apocalyptic number.

It is an amenable number.

85181225 is a deficient number, since it is larger than the sum of its proper divisors (21002455).

85181225 is a wasteful number, since it uses less digits than its factorization.

85181225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18040 (or 18035 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 85181225 is about 9229.3675297931. The cubic root of 85181225 is about 439.9952220556.

The spelling of 85181225 in words is "eighty-five million, one hundred eighty-one thousand, two hundred twenty-five".