312131425 has 24 divisors (see below), whose sum is σ = 392825304. Its totient is φ = 246005760.

The previous prime is 312131399. The next prime is 312131431. The reversal of 312131425 is 524131213.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 283046976 + 29084449 = 16824^2 + 5393^2 .

It is not a de Polignac number, because 312131425 - 2⁹ = 312130913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312131396 and 312131405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 884049 + ... + 884401.

It is an arithmetic number, because the mean of its divisors is an integer number (16367721).

Almost surely, 2^312131425 is an apocalyptic number.

It is an amenable number.

312131425 is a deficient number, since it is larger than the sum of its proper divisors (80693879).

312131425 is a wasteful number, since it uses less digits than its factorization.

312131425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 784 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 312131425 is about 17667.2415786959. The cubic root of 312131425 is about 678.3375081325.

Adding to 312131425 its reverse (524131213), we get a palindrome (836262638).

The spelling of 312131425 in words is "three hundred twelve million, one hundred thirty-one thousand, four hundred twenty-five".