31145265 has 12 divisors (see below), whose sum is σ = 53985204. Its totient is φ = 16610784.

The previous prime is 31145227. The next prime is 31145293. The reversal of 31145265 is 56254113.

It can be written as a sum of positive squares in 2 ways, for example, as 18249984 + 12895281 = 4272^2 + 3591^2 .

It is not a de Polignac number, because 31145265 - 2⁷ = 31145137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 346014 + ... + 346103.

It is an arithmetic number, because the mean of its divisors is an integer number (4498767).

Almost surely, 2^31145265 is an apocalyptic number.

It is an amenable number.

31145265 is a deficient number, since it is larger than the sum of its proper divisors (22839939).

31145265 is a wasteful number, since it uses less digits than its factorization.

31145265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692128 (or 692125 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 31145265 is about 5580.7942983056. The cubic root of 31145265 is about 314.6279810710.

Adding to 31145265 its reverse (56254113), we get a palindrome (87399378).

The spelling of 31145265 in words is "thirty-one million, one hundred forty-five thousand, two hundred sixty-five".