152404221 has 32 divisors (see below), whose sum is σ = 215728128. Its totient is φ = 95584320.

The previous prime is 152404211. The next prime is 152404237. The reversal of 152404221 is 122404251.

It is not a de Polignac number, because 152404221 - 2⁶ = 152404157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152404211) 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 31 ways as a sum of consecutive naturals, for example, 683316 + ... + 683538.

It is an arithmetic number, because the mean of its divisors is an integer number (6741504).

Almost surely, 2^152404221 is an apocalyptic number.

It is an amenable number.

152404221 is a deficient number, since it is larger than the sum of its proper divisors (63323907).

152404221 is a wasteful number, since it uses less digits than its factorization.

152404221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 152404221 is about 12345.2104477810. The cubic root of 152404221 is about 534.1529916949.

Adding to 152404221 its reverse (122404251), we get a palindrome (274808472).

The spelling of 152404221 in words is "one hundred fifty-two million, four hundred four thousand, two hundred twenty-one".