150800821 has 4 divisors (see below), whose sum is σ = 150837100. Its totient is φ = 150764544.

The previous prime is 150800801. The next prime is 150800827. The reversal of 150800821 is 128008051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44422225 + 106378596 = 6665^2 + 10314^2 .

It is a cyclic number.

It is not a de Polignac number, because 150800821 - 2¹¹ = 150798773 is a prime.

It is a super-2 number, since 2×150800821² = 45481775228548082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150800827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10956 + ... + 20533.

It is an arithmetic number, because the mean of its divisors is an integer number (37709275).

Almost surely, 2^150800821 is an apocalyptic number.

It is an amenable number.

150800821 is a deficient number, since it is larger than the sum of its proper divisors (36279).

150800821 is an equidigital number, since it uses as much as digits as its factorization.

150800821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36278.

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

The square root of 150800821 is about 12280.0985745229. The cubic root of 150800821 is about 532.2731616287.

Adding to 150800821 its reverse (128008051), we get a palindrome (278808872).

The spelling of 150800821 in words is "one hundred fifty million, eight hundred thousand, eight hundred twenty-one".