31345065 has 48 divisors (see below), whose sum is σ = 56504448. Its totient is φ = 16063488.

The previous prime is 31345057. The next prime is 31345073. The reversal of 31345065 is 56054313.

It is an interprime number because it is at equal distance from previous prime (31345057) and next prime (31345073).

It is not a de Polignac number, because 31345065 - 2³ = 31345057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187612 + ... + 187778.

It is an arithmetic number, because the mean of its divisors is an integer number (1177176).

Almost surely, 2^31345065 is an apocalyptic number.

It is an amenable number.

31345065 is a deficient number, since it is larger than the sum of its proper divisors (25159383).

31345065 is a wasteful number, since it uses less digits than its factorization.

31345065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 31345065 is about 5598.6663590537. Note that the first 3 decimals coincide. The cubic root of 31345065 is about 315.2993375271.

Adding to 31345065 its reverse (56054313), we get a palindrome (87399378).

The spelling of 31345065 in words is "thirty-one million, three hundred forty-five thousand, sixty-five".