821500150 has 24 divisors (see below), whose sum is σ = 1608412680. Its totient is φ = 311304960.

The previous prime is 821500117. The next prime is 821500151. The reversal of 821500150 is 51005128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821500151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431419 + ... + 433318.

It is an arithmetic number, because the mean of its divisors is an integer number (67017195).

Almost surely, 2^821500150 is an apocalyptic number.

821500150 is a deficient number, since it is larger than the sum of its proper divisors (786912530).

821500150 is a wasteful number, since it uses less digits than its factorization.

821500150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864768 (or 864763 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 821500150 is about 28661.8239126543. The cubic root of 821500150 is about 936.5605973757.

Adding to 821500150 its reverse (51005128), we get a palindrome (872505278).

The spelling of 821500150 in words is "eight hundred twenty-one million, five hundred thousand, one hundred fifty".