150221445521 has 8 divisors (see below), whose sum is σ = 171814645824. Its totient is φ = 128661493680.

The previous prime is 150221445469. The next prime is 150221445601. The reversal of 150221445521 is 125544122051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 150221445521 - 2⁶ = 150221445457 is a prime.

It is a super-2 number, since 2×150221445521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150221415521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8302430 + ... + 8320503.

It is an arithmetic number, because the mean of its divisors is an integer number (21476830728).

Almost surely, 2^150221445521 is an apocalyptic number.

It is an amenable number.

150221445521 is a deficient number, since it is larger than the sum of its proper divisors (21593200303).

150221445521 is a wasteful number, since it uses less digits than its factorization.

150221445521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16624231.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 150221445521 its reverse (125544122051), we get a palindrome (275765567572).

The spelling of 150221445521 in words is "one hundred fifty billion, two hundred twenty-one million, four hundred forty-five thousand, five hundred twenty-one".