153825821 has 2 divisors, whose sum is σ = 153825822. Its totient is φ = 153825820.

The previous prime is 153825799. The next prime is 153825823. The reversal of 153825821 is 128528351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149181796 + 4644025 = 12214^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 153825821 - 2¹⁴ = 153809437 is a prime.

Together with 153825823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153825823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76912910 + 76912911.

It is an arithmetic number, because the mean of its divisors is an integer number (76912911).

Almost surely, 2^153825821 is an apocalyptic number.

It is an amenable number.

153825821 is a deficient number, since it is larger than the sum of its proper divisors (1).

153825821 is an equidigital number, since it uses as much as digits as its factorization.

153825821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 35.

The square root of 153825821 is about 12402.6537886051. The cubic root of 153825821 is about 535.8086829735.

The spelling of 153825821 in words is "one hundred fifty-three million, eight hundred twenty-five thousand, eight hundred twenty-one".