53440311 has 8 divisors (see below), whose sum is σ = 73552384. Its totient is φ = 34477560.

The previous prime is 53440267. The next prime is 53440337. The reversal of 53440311 is 11304435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53440311 - 2⁷ = 53440183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287221 + ... + 287406.

It is an arithmetic number, because the mean of its divisors is an integer number (9194048).

Almost surely, 2^53440311 is an apocalyptic number.

53440311 is a deficient number, since it is larger than the sum of its proper divisors (20112073).

53440311 is a wasteful number, since it uses less digits than its factorization.

53440311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574661.

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

The square root of 53440311 is about 7310.2880244215. The cubic root of 53440311 is about 376.6659180640.

Adding to 53440311 its reverse (11304435), we get a palindrome (64744746).

The spelling of 53440311 in words is "fifty-three million, four hundred forty thousand, three hundred eleven".