151243221 has 8 divisors (see below), whose sum is σ = 202070304. Its totient is φ = 100622480.

The previous prime is 151243163. The next prime is 151243229. The reversal of 151243221 is 122342151.

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

It is a cyclic number.

It is not a de Polignac number, because 151243221 - 2⁷ = 151243093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151243229) 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, 49866 + ... + 52811.

It is an arithmetic number, because the mean of its divisors is an integer number (25258788).

Almost surely, 2^151243221 is an apocalyptic number.

It is an amenable number.

151243221 is a deficient number, since it is larger than the sum of its proper divisors (50827083).

151243221 is a wasteful number, since it uses less digits than its factorization.

151243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103171.

The product of its digits is 480, while the sum is 21.

The square root of 151243221 is about 12298.0982676185. The cubic root of 151243221 is about 532.7931582450.

Adding to 151243221 its reverse (122342151), we get a palindrome (273585372).

The spelling of 151243221 in words is "one hundred fifty-one million, two hundred forty-three thousand, two hundred twenty-one".