440145513 has 6 divisors (see below), whose sum is σ = 635765754. Its totient is φ = 293430336.

The previous prime is 440145493. The next prime is 440145527. The reversal of 440145513 is 315541044.

It is a happy number.

440145513 is a `hidden beast` number, since 4 + 4 + 0 + 145 + 513 = 666.

It can be written as a sum of positive squares in only one way, i.e., 439866729 + 278784 = 20973^2 + 528^2 .

It is not a de Polignac number, because 440145513 - 2⁵ = 440145481 is a prime.

It is a super-2 number, since 2×440145513² = 387456145228066338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (440145313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24452520 + ... + 24452537.

It is an arithmetic number, because the mean of its divisors is an integer number (105960959).

Almost surely, 2^440145513 is an apocalyptic number.

It is an amenable number.

440145513 is a deficient number, since it is larger than the sum of its proper divisors (195620241).

440145513 is a wasteful number, since it uses less digits than its factorization.

440145513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48905063 (or 48905060 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 440145513 is about 20979.6452067236. The cubic root of 440145513 is about 760.6743282174.

Adding to 440145513 its reverse (315541044), we get a palindrome (755686557).

The spelling of 440145513 in words is "four hundred forty million, one hundred forty-five thousand, five hundred thirteen".