528812431 has 4 divisors (see below), whose sum is σ = 604357072. Its totient is φ = 453267792.

The previous prime is 528812423. The next prime is 528812443. The reversal of 528812431 is 134218825.

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 528812431 - 2³ = 528812423 is a prime.

It is a super-2 number, since 2×528812431² = 559285174360259522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528812411) 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, 37772310 + ... + 37772323.

It is an arithmetic number, because the mean of its divisors is an integer number (151089268).

Almost surely, 2^528812431 is an apocalyptic number.

528812431 is a deficient number, since it is larger than the sum of its proper divisors (75544641).

528812431 is an equidigital number, since it uses as much as digits as its factorization.

528812431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75544640.

The product of its digits is 15360, while the sum is 34.

The square root of 528812431 is about 22995.9220515290. The cubic root of 528812431 is about 808.6623407591.

The spelling of 528812431 in words is "five hundred twenty-eight million, eight hundred twelve thousand, four hundred thirty-one".