385724225 has 12 divisors (see below), whose sum is σ = 503472240. Its totient is φ = 292338000.

The previous prime is 385724221. The next prime is 385724239. The reversal of 385724225 is 522427583.

It is not a de Polignac number, because 385724225 - 2² = 385724221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385724221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405551 + ... + 406500.

It is an arithmetic number, because the mean of its divisors is an integer number (41956020).

Almost surely, 2^385724225 is an apocalyptic number.

It is an amenable number.

385724225 is a deficient number, since it is larger than the sum of its proper divisors (117748015).

385724225 is a wasteful number, since it uses less digits than its factorization.

385724225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812080 (or 812075 counting only the distinct ones).

The product of its digits is 134400, while the sum is 38.

The square root of 385724225 is about 19639.8631614378. The cubic root of 385724225 is about 727.9345034513.

It can be divided in two parts, 3857 and 24225, that added together give a palindrome (28082).

The spelling of 385724225 in words is "three hundred eighty-five million, seven hundred twenty-four thousand, two hundred twenty-five".