152512221 has 8 divisors (see below), whose sum is σ = 214052320. Its totient is φ = 96323472.

The previous prime is 152512201. The next prime is 152512231. The reversal of 152512221 is 122215251.

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

It is not a de Polignac number, because 152512221 - 2²³ = 144123613 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 (152512201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1337770 + ... + 1337883.

It is an arithmetic number, because the mean of its divisors is an integer number (26756540).

Almost surely, 2^152512221 is an apocalyptic number.

It is an amenable number.

152512221 is a deficient number, since it is larger than the sum of its proper divisors (61540099).

152512221 is a wasteful number, since it uses less digits than its factorization.

152512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675675.

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

The square root of 152512221 is about 12349.5838391421. The cubic root of 152512221 is about 534.2791362799.

Adding to 152512221 its reverse (122215251), we get a palindrome (274727472).

The spelling of 152512221 in words is "one hundred fifty-two million, five hundred twelve thousand, two hundred twenty-one".