156027221 has 24 divisors (see below), whose sum is σ = 197676000. Its totient is φ = 122308704.

The previous prime is 156027191. The next prime is 156027227. The reversal of 156027221 is 122720651.

It is not a de Polignac number, because 156027221 - 2²² = 151832917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156027227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24110 + ... + 29888.

It is an arithmetic number, because the mean of its divisors is an integer number (8236500).

Almost surely, 2^156027221 is an apocalyptic number.

It is an amenable number.

156027221 is a deficient number, since it is larger than the sum of its proper divisors (41648779).

156027221 is a wasteful number, since it uses less digits than its factorization.

156027221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841 (or 5834 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 156027221 is about 12491.0856613827. The cubic root of 156027221 is about 538.3525705908.

Adding to 156027221 its reverse (122720651), we get a palindrome (278747872).

The spelling of 156027221 in words is "one hundred fifty-six million, twenty-seven thousand, two hundred twenty-one".