31425965 has 4 divisors (see below), whose sum is σ = 37711164. Its totient is φ = 25140768.

The previous prime is 31425941. The next prime is 31426001. The reversal of 31425965 is 56952413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56952413 = 7 ⋅8136059.

It can be written as a sum of positive squares in 2 ways, for example, as 25020004 + 6405961 = 5002^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 31425965 - 2¹² = 31421869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3142592 + ... + 3142601.

It is an arithmetic number, because the mean of its divisors is an integer number (9427791).

Almost surely, 2^31425965 is an apocalyptic number.

It is an amenable number.

31425965 is a deficient number, since it is larger than the sum of its proper divisors (6285199).

31425965 is an equidigital number, since it uses as much as digits as its factorization.

31425965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285198.

The product of its digits is 32400, while the sum is 35.

The square root of 31425965 is about 5605.8866381688. The cubic root of 31425965 is about 315.5703616167.

The spelling of 31425965 in words is "thirty-one million, four hundred twenty-five thousand, nine hundred sixty-five".