152251221 has 8 divisors (see below), whose sum is σ = 204295264. Its totient is φ = 100854000.

The previous prime is 152251219. The next prime is 152251223. The reversal of 152251221 is 122152251.

It is an interprime number because it is at equal distance from previous prime (152251219) and next prime (152251223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 152251221 - 2¹ = 152251219 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 (152251223) 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 7 ways as a sum of consecutive naturals, for example, 161155 + ... + 162096.

It is an arithmetic number, because the mean of its divisors is an integer number (25536908).

Almost surely, 2^152251221 is an apocalyptic number.

It is an amenable number.

152251221 is a deficient number, since it is larger than the sum of its proper divisors (52044043).

152251221 is a wasteful number, since it uses less digits than its factorization.

152251221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323411.

The product of its digits is 400, while the sum is 21.

The square root of 152251221 is about 12339.0121565707. The cubic root of 152251221 is about 533.9741848116.

The spelling of 152251221 in words is "one hundred fifty-two million, two hundred fifty-one thousand, two hundred twenty-one".