152508221 has 4 divisors (see below), whose sum is σ = 152533500. Its totient is φ = 152482944.

The previous prime is 152508217. The next prime is 152508259. The reversal of 152508221 is 122805251.

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 34351321 + 118156900 = 5861^2 + 10870^2 .

It is a cyclic number.

It is not a de Polignac number, because 152508221 - 2² = 152508217 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 (152508121) 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, 2285 + ... + 17613.

It is an arithmetic number, because the mean of its divisors is an integer number (38133375).

Almost surely, 2^152508221 is an apocalyptic number.

It is an amenable number.

152508221 is a deficient number, since it is larger than the sum of its proper divisors (25279).

152508221 is an equidigital number, since it uses as much as digits as its factorization.

152508221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25278.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 152508221 is about 12349.4218893032. The cubic root of 152508221 is about 534.2744653204.

The spelling of 152508221 in words is "one hundred fifty-two million, five hundred eight thousand, two hundred twenty-one".