150721805 has 24 divisors (see below), whose sum is σ = 197798112. Its totient is φ = 110195904.

The previous prime is 150721763. The next prime is 150721819. The reversal of 150721805 is 508127051.

It is not a de Polignac number, because 150721805 - 2⁶ = 150721741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89582 + ... + 91248.

It is an arithmetic number, because the mean of its divisors is an integer number (8241588).

Almost surely, 2^150721805 is an apocalyptic number.

It is an amenable number.

150721805 is a deficient number, since it is larger than the sum of its proper divisors (47076307).

150721805 is a wasteful number, since it uses less digits than its factorization.

150721805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 150721805 is about 12276.8809149556. The cubic root of 150721805 is about 532.1801792789.

Adding to 150721805 its reverse (508127051), we get a palindrome (658848856).

The spelling of 150721805 in words is "one hundred fifty million, seven hundred twenty-one thousand, eight hundred five".