3131225 has 12 divisors (see below), whose sum is σ = 3906000. Its totient is φ = 2490000.

The previous prime is 3131221. The next prime is 3131231. The reversal of 3131225 is 5221313.

It is not a de Polignac number, because 3131225 - 2² = 3131221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131221) 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, 6026 + ... + 6524.

It is an arithmetic number, because the mean of its divisors is an integer number (325500).

Almost surely, 2^3131225 is an apocalyptic number.

It is an amenable number.

3131225 is a deficient number, since it is larger than the sum of its proper divisors (774775).

3131225 is a wasteful number, since it uses less digits than its factorization.

3131225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 755 counting only the distinct ones).

The product of its digits is 180, while the sum is 17.

The square root of 3131225 is about 1769.5267728972. The cubic root of 3131225 is about 146.2978999114.

Adding to 3131225 its reverse (5221313), we get a palindrome (8352538).

The spelling of 3131225 in words is "three million, one hundred thirty-one thousand, two hundred twenty-five".