523303531 has 2 divisors, whose sum is σ = 523303532. Its totient is φ = 523303530.

The previous prime is 523303483. The next prime is 523303577. The reversal of 523303531 is 135303325.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523303531 - 2⁹ = 523303019 is a prime.

It is a super-2 number, since 2×523303531² = 547693171114135922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523303496 and 523303505.

It is not a weakly prime, because it can be changed into another prime (523303831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261651765 + 261651766.

It is an arithmetic number, because the mean of its divisors is an integer number (261651766).

Almost surely, 2^523303531 is an apocalyptic number.

523303531 is a deficient number, since it is larger than the sum of its proper divisors (1).

523303531 is an equidigital number, since it uses as much as digits as its factorization.

523303531 is an evil number, because the sum of its binary digits is even.

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

The square root of 523303531 is about 22875.8285314434. The cubic root of 523303531 is about 805.8444546904.

Adding to 523303531 its reverse (135303325), we get a palindrome (658606856).

The spelling of 523303531 in words is "five hundred twenty-three million, three hundred three thousand, five hundred thirty-one".