152206321 has 16 divisors (see below), whose sum is σ = 172056960. Its totient is φ = 133781760.

The previous prime is 152206261. The next prime is 152206343. The reversal of 152206321 is 123602251.

It is a cyclic number.

It is not a de Polignac number, because 152206321 - 2⁷ = 152206193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 152206292 and 152206301.

It is not an unprimeable number, because it can be changed into a prime (152206381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19615 + ... + 26251.

It is an arithmetic number, because the mean of its divisors is an integer number (10753560).

Almost surely, 2^152206321 is an apocalyptic number.

It is an amenable number.

152206321 is a deficient number, since it is larger than the sum of its proper divisors (19850639).

152206321 is a wasteful number, since it uses less digits than its factorization.

152206321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6744.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 152206321 is about 12337.1925898885. The cubic root of 152206321 is about 533.9216886850.

Adding to 152206321 its reverse (123602251), we get a palindrome (275808572).

The spelling of 152206321 in words is "one hundred fifty-two million, two hundred six thousand, three hundred twenty-one".