3131143225 has 12 divisors (see below), whose sum is σ = 4437277504. Its totient is φ = 2147069520.

The previous prime is 3131143207. The next prime is 3131143231. The reversal of 3131143225 is 5223411313.

It is a happy number.

3131143225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3131143225 - 2²³ = 3122754617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131143225.

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, 8945949 + ... + 8946298.

Almost surely, 2^3131143225 is an apocalyptic number.

3131143225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3131143225 is a deficient number, since it is larger than the sum of its proper divisors (1306134279).

3131143225 is a wasteful number, since it uses less digits than its factorization.

3131143225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17892264 (or 17892259 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 3131143225 is about 55956.6191348262. The cubic root of 3131143225 is about 1462.9662632946.

Adding to 3131143225 its reverse (5223411313), we get a palindrome (8354554538).

The spelling of 3131143225 in words is "three billion, one hundred thirty-one million, one hundred forty-three thousand, two hundred twenty-five".