31242330025 has 81 divisors (see below), whose sum is σ = 42749036239. Its totient is φ = 22647264640.

The previous prime is 31242330017. The next prime is 31242330043. The reversal of 31242330025 is 52003324213.

The square root of 31242330025 is 176755.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 12172929561 + 19069400464 = 110331^2 + 138092^2 .

It is not a de Polignac number, because 31242330025 - 2³ = 31242330017 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 589477899 + ... + 589477951.

Almost surely, 2^31242330025 is an apocalyptic number.

31242330025 is the 176755-th square number.

31242330025 is the 88378-th centered octagonal number.

It is an amenable number.

31242330025 is a deficient number, since it is larger than the sum of its proper divisors (11506706214).

31242330025 is an equidigital number, since it uses as much as digits as its factorization.

31242330025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Multiplying 31242330025 by its sum of digits (25), we get a square (781058250625 = 883775²).

31242330025 divided by its sum of digits (25) gives a square (1249693201 = 35351²).

Adding to 31242330025 its reverse (52003324213), we get a palindrome (83245654238).

The spelling of 31242330025 in words is "thirty-one billion, two hundred forty-two million, three hundred thirty thousand, twenty-five".