150821819 has 2 divisors, whose sum is σ = 150821820. Its totient is φ = 150821818.

The previous prime is 150821777. The next prime is 150821843. The reversal of 150821819 is 918128051.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 150821819 - 2²⁰ = 149773243 is a prime.

It is a super-2 number, since 2×150821819² = 45494442172937522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (150821849) 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, 75410909 + 75410910.

It is an arithmetic number, because the mean of its divisors is an integer number (75410910).

Almost surely, 2^150821819 is an apocalyptic number.

150821819 is a deficient number, since it is larger than the sum of its proper divisors (1).

150821819 is an equidigital number, since it uses as much as digits as its factorization.

150821819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 35.

The square root of 150821819 is about 12280.9535053269. The cubic root of 150821819 is about 532.2978656347.

The spelling of 150821819 in words is "one hundred fifty million, eight hundred twenty-one thousand, eight hundred nineteen".