150011721 has 12 divisors (see below), whose sum is σ = 216821748. Its totient is φ = 99944064.

The previous prime is 150011647. The next prime is 150011747. The reversal of 150011721 is 127110051.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 139358025 + 10653696 = 11805^2 + 3264^2 .

It is not a de Polignac number, because 150011721 - 2¹⁸ = 149749577 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 150011694 and 150011703.

It is not an unprimeable number, because it can be changed into a prime (150011021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12861 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (18068479).

Almost surely, 2^150011721 is an apocalyptic number.

It is an amenable number.

150011721 is a deficient number, since it is larger than the sum of its proper divisors (66810027).

150011721 is a wasteful number, since it uses less digits than its factorization.

150011721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10629 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 150011721 is about 12247.9272123899. The cubic root of 150011721 is about 531.3431235876.

Adding to 150011721 its reverse (127110051), we get a palindrome (277121772).

The spelling of 150011721 in words is "one hundred fifty million, eleven thousand, seven hundred twenty-one".