53403231 has 16 divisors (see below), whose sum is σ = 81561600. Its totient is φ = 30446688.

The previous prime is 53403227. The next prime is 53403241. The reversal of 53403231 is 13230435.

It is not a de Polignac number, because 53403231 - 2² = 53403227 is a prime.

It is a super-2 number, since 2×53403231² = 5703810162478722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 53403198 and 53403207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403241) 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, 7405 + ... + 12713.

It is an arithmetic number, because the mean of its divisors is an integer number (5097600).

Almost surely, 2^53403231 is an apocalyptic number.

53403231 is a deficient number, since it is larger than the sum of its proper divisors (28158369).

53403231 is a wasteful number, since it uses less digits than its factorization.

53403231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798.

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

The square root of 53403231 is about 7307.7514325543. The cubic root of 53403231 is about 376.5787803238.

Adding to 53403231 its reverse (13230435), we get a palindrome (66633666).

The spelling of 53403231 in words is "fifty-three million, four hundred three thousand, two hundred thirty-one".