53440331 has 24 divisors (see below), whose sum is σ = 66580560. Its totient is φ = 42638400.

The previous prime is 53440267. The next prime is 53440337. The reversal of 53440331 is 13304435.

It is not a de Polignac number, because 53440331 - 2⁶ = 53440267 is a prime.

It is a super-2 number, since 2×53440331² = 5711737954779122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53440297 and 53440306.

It is not an unprimeable number, because it can be changed into a prime (53440337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56321 + ... + 57261.

It is an arithmetic number, because the mean of its divisors is an integer number (2774190).

Almost surely, 2^53440331 is an apocalyptic number.

53440331 is a deficient number, since it is larger than the sum of its proper divisors (13140229).

53440331 is a wasteful number, since it uses less digits than its factorization.

53440331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 53440331 is about 7310.2893923565. The cubic root of 53440331 is about 376.6659650529.

Adding to 53440331 its reverse (13304435), we get a palindrome (66744766).

The spelling of 53440331 in words is "fifty-three million, four hundred forty thousand, three hundred thirty-one".