825601531 has 2 divisors, whose sum is σ = 825601532. Its totient is φ = 825601530.

The previous prime is 825601523. The next prime is 825601571. The reversal of 825601531 is 135106528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825601531 - 2³ = 825601523 is a prime.

It is a super-2 number, since 2×825601531² = 1363235775979087922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 825601493 and 825601502.

It is not a weakly prime, because it can be changed into another prime (825601571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412800765 + 412800766.

It is an arithmetic number, because the mean of its divisors is an integer number (412800766).

Almost surely, 2^825601531 is an apocalyptic number.

825601531 is a deficient number, since it is larger than the sum of its proper divisors (1).

825601531 is an equidigital number, since it uses as much as digits as its factorization.

825601531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 825601531 is about 28733.2826352994. The cubic root of 825601531 is about 938.1166194340.

The spelling of 825601531 in words is "eight hundred twenty-five million, six hundred one thousand, five hundred thirty-one".