40031265 has 16 divisors (see below), whose sum is σ = 64266048. Its totient is φ = 21278016.

The previous prime is 40031239. The next prime is 40031269. The reversal of 40031265 is 56213004.

It is a happy number.

It is not a de Polignac number, because 40031265 - 2⁸ = 40031009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40031269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (4016628).

Almost surely, 2^40031265 is an apocalyptic number.

It is an amenable number.

40031265 is a deficient number, since it is larger than the sum of its proper divisors (24234783).

40031265 is a wasteful number, since it uses less digits than its factorization.

40031265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40031265 is about 6327.0265528129. The cubic root of 40031265 is about 342.0842701267.

Adding to 40031265 its reverse (56213004), we get a palindrome (96244269).

The spelling of 40031265 in words is "forty million, thirty-one thousand, two hundred sixty-five".