53203431 has 4 divisors (see below), whose sum is σ = 70937912. Its totient is φ = 35468952.

The previous prime is 53203379. The next prime is 53203511. The reversal of 53203431 is 13430235.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53203431 - 2⁷ = 53203303 is a prime.

It is a super-3 number, since 3×53203431³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53203398 and 53203407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53203231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8867236 + ... + 8867241.

It is an arithmetic number, because the mean of its divisors is an integer number (17734478).

Almost surely, 2^53203431 is an apocalyptic number.

53203431 is a deficient number, since it is larger than the sum of its proper divisors (17734481).

53203431 is a wasteful number, since it uses less digits than its factorization.

53203431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17734480.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 53203431 is about 7294.0682064264. The cubic root of 53203431 is about 376.1085561573.

Adding to 53203431 its reverse (13430235), we get a palindrome (66633666).

The spelling of 53203431 in words is "fifty-three million, two hundred three thousand, four hundred thirty-one".