53323531 has 4 divisors (see below), whose sum is σ = 53404864. Its totient is φ = 53242200.

The previous prime is 53323471. The next prime is 53323541. The reversal of 53323531 is 13532335.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53323531 - 2¹¹ = 53321483 is a prime.

It is a super-2 number, since 2×53323531² = 5686797916615922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53323496 and 53323505.

It is not an unprimeable number, because it can be changed into a prime (53323541) 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, 39675 + ... + 40996.

It is an arithmetic number, because the mean of its divisors is an integer number (13351216).

Almost surely, 2^53323531 is an apocalyptic number.

53323531 is a deficient number, since it is larger than the sum of its proper divisors (81333).

53323531 is an equidigital number, since it uses as much as digits as its factorization.

53323531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81332.

The product of its digits is 4050, while the sum is 25.

The square root of 53323531 is about 7302.2962826771. The cubic root of 53323531 is about 376.3913492674.

Adding to 53323531 its reverse (13532335), we get a palindrome (66855866).

The spelling of 53323531 in words is "fifty-three million, three hundred twenty-three thousand, five hundred thirty-one".