150821800 has 24 divisors (see below), whose sum is σ = 350661150. Its totient is φ = 60328640.

The previous prime is 150821777. The next prime is 150821819. The reversal of 150821800 is 8128051.

It can be written as a sum of positive squares in 3 ways, for example, as 84529636 + 66292164 = 9194^2 + 8142^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376855 + ... + 377254.

Almost surely, 2^150821800 is an apocalyptic number.

150821800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

150821800 is an abundant number, since it is smaller than the sum of its proper divisors (199839350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

150821800 is a wasteful number, since it uses less digits than its factorization.

150821800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754125 (or 754116 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 150821800 is about 12280.9527317713. The cubic root of 150821800 is about 532.2978432823.

Adding to 150821800 its reverse (8128051), we get a palindrome (158949851).

The spelling of 150821800 in words is "one hundred fifty million, eight hundred twenty-one thousand, eight hundred".