152532221 has 4 divisors (see below), whose sum is σ = 152583552. Its totient is φ = 152480892.

The previous prime is 152532217. The next prime is 152532227. The reversal of 152532221 is 122235251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 152532221 - 2² = 152532217 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 (152532227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20915 + ... + 27248.

It is an arithmetic number, because the mean of its divisors is an integer number (38145888).

Almost surely, 2^152532221 is an apocalyptic number.

It is an amenable number.

152532221 is a deficient number, since it is larger than the sum of its proper divisors (51331).

152532221 is an equidigital number, since it uses as much as digits as its factorization.

152532221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51330.

The product of its digits is 1200, while the sum is 23.

The square root of 152532221 is about 12350.3935564823. The cubic root of 152532221 is about 534.3024898525.

Adding to 152532221 its reverse (122235251), we get a palindrome (274767472).

The spelling of 152532221 in words is "one hundred fifty-two million, five hundred thirty-two thousand, two hundred twenty-one".