152213433221 has 4 divisors (see below), whose sum is σ = 152232342732. Its totient is φ = 152194523712.

The previous prime is 152213433217. The next prime is 152213433223. The reversal of 152213433221 is 122334312251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49742380900 + 102471052321 = 223030^2 + 320111^2 .

It is a cyclic number.

It is not a de Polignac number, because 152213433221 - 2² = 152213433217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152213433223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9442676 + ... + 9458781.

It is an arithmetic number, because the mean of its divisors is an integer number (38058085683).

Almost surely, 2^152213433221 is an apocalyptic number.

It is an amenable number.

152213433221 is a deficient number, since it is larger than the sum of its proper divisors (18909511).

152213433221 is an equidigital number, since it uses as much as digits as its factorization.

152213433221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18909510.

The product of its digits is 8640, while the sum is 29.

Adding to 152213433221 its reverse (122334312251), we get a palindrome (274547745472).

The spelling of 152213433221 in words is "one hundred fifty-two billion, two hundred thirteen million, four hundred thirty-three thousand, two hundred twenty-one".