31409425 has 12 divisors (see below), whose sum is σ = 39020940. Its totient is φ = 25080320.

The previous prime is 31409423. The next prime is 31409429. The reversal of 31409425 is 52490413.

It can be written as a sum of positive squares in 6 ways, for example, as 762129 + 30647296 = 873^2 + 5536^2 .

It is not a de Polignac number, because 31409425 - 2¹ = 31409423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31409393 and 31409402.

It is not an unprimeable number, because it can be changed into a prime (31409423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19449 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (3251745).

Almost surely, 2^31409425 is an apocalyptic number.

It is an amenable number.

31409425 is a deficient number, since it is larger than the sum of its proper divisors (7611515).

31409425 is a wasteful number, since it uses less digits than its factorization.

31409425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 31409425 is about 5604.4112090388. The cubic root of 31409425 is about 315.5149886180.

Adding to 31409425 its reverse (52490413), we get a palindrome (83899838).

The spelling of 31409425 in words is "thirty-one million, four hundred nine thousand, four hundred twenty-five".