31415225 has 12 divisors (see below), whose sum is σ = 39906300. Its totient is φ = 24518400.

The previous prime is 31415221. The next prime is 31415231. The reversal of 31415225 is 52251413.

It can be written as a sum of positive squares in 6 ways, for example, as 14531344 + 16883881 = 3812^2 + 4109^2 .

It is not a de Polignac number, because 31415225 - 2² = 31415221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31415225.

It is not an unprimeable number, because it can be changed into a prime (31415221) 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, 14300 + ... + 16349.

It is an arithmetic number, because the mean of its divisors is an integer number (3325525).

Almost surely, 2^31415225 is an apocalyptic number.

It is an amenable number.

31415225 is a deficient number, since it is larger than the sum of its proper divisors (8491075).

31415225 is a wasteful number, since it uses less digits than its factorization.

31415225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30700 (or 30695 counting only the distinct ones).

The product of its digits is 1200, while the sum is 23.

The square root of 31415225 is about 5604.9286346929. The cubic root of 31415225 is about 315.5344082063.

Adding to 31415225 its reverse (52251413), we get a palindrome (83666638).

The spelling of 31415225 in words is "thirty-one million, four hundred fifteen thousand, two hundred twenty-five".