31006025 has 6 divisors (see below), whose sum is σ = 38447502. Its totient is φ = 24804800.

The previous prime is 31006021. The next prime is 31006033. The reversal of 31006025 is 52060013.

It can be written as a sum of positive squares in 3 ways, for example, as 678976 + 30327049 = 824^2 + 5507^2 .

It is not a de Polignac number, because 31006025 - 2² = 31006021 is a prime.

It is a super-2 number, since 2×31006025² = 1922747172601250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31005994 and 31006012.

It is not an unprimeable number, because it can be changed into a prime (31006021) 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 5 ways as a sum of consecutive naturals, for example, 620096 + ... + 620145.

It is an arithmetic number, because the mean of its divisors is an integer number (6407917).

Almost surely, 2^31006025 is an apocalyptic number.

It is an amenable number.

31006025 is a deficient number, since it is larger than the sum of its proper divisors (7441477).

31006025 is a wasteful number, since it uses less digits than its factorization.

31006025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240251 (or 1240246 counting only the distinct ones).

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

The square root of 31006025 is about 5568.3053975155. The cubic root of 31006025 is about 314.1584153385.

Adding to 31006025 its reverse (52060013), we get a palindrome (83066038).

The spelling of 31006025 in words is "thirty-one million, six thousand, twenty-five".