825020531 has 2 divisors, whose sum is σ = 825020532. Its totient is φ = 825020530.

The previous prime is 825020503. The next prime is 825020543. The reversal of 825020531 is 135020528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825020531 - 2²⁶ = 757911667 is a prime.

It is a super-3 number, since 3×825020531³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 825020531.

It is not a weakly prime, because it can be changed into another prime (825020551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412510265 + 412510266.

It is an arithmetic number, because the mean of its divisors is an integer number (412510266).

Almost surely, 2^825020531 is an apocalyptic number.

825020531 is a deficient number, since it is larger than the sum of its proper divisors (1).

825020531 is an equidigital number, since it uses as much as digits as its factorization.

825020531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 825020531 is about 28723.1706293021. The cubic root of 825020531 is about 937.8965077375.

The spelling of 825020531 in words is "eight hundred twenty-five million, twenty thousand, five hundred thirty-one".