151220144 has 20 divisors (see below), whose sum is σ = 293601000. Its totient is φ = 75452160.

The previous prime is 151220143. The next prime is 151220149. The reversal of 151220144 is 441022151.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (151220143) 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 3 ways as a sum of consecutive naturals, for example, 1769 + ... + 17480.

It is an arithmetic number, because the mean of its divisors is an integer number (14680050).

Almost surely, 2^151220144 is an apocalyptic number.

It is an amenable number.

151220144 is a deficient number, since it is larger than the sum of its proper divisors (142380856).

151220144 is a wasteful number, since it uses less digits than its factorization.

151220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19748 (or 19742 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 151220144 is about 12297.1599973327. The cubic root of 151220144 is about 532.7660586434.

Adding to 151220144 its reverse (441022151), we get a palindrome (592242295).

The spelling of 151220144 in words is "one hundred fifty-one million, two hundred twenty thousand, one hundred forty-four".