151221424 has 10 divisors (see below), whose sum is σ = 292991540. Its totient is φ = 75610704.

The previous prime is 151221403. The next prime is 151221431. The reversal of 151221424 is 424122151.

It is a junction number, because it is equal to n+sod(n) for n = 151221395 and 151221404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4725654 + ... + 4725685.

It is an arithmetic number, because the mean of its divisors is an integer number (29299154).

Almost surely, 2^151221424 is an apocalyptic number.

It is an amenable number.

151221424 is a deficient number, since it is larger than the sum of its proper divisors (141770116).

151221424 is an equidigital number, since it uses as much as digits as its factorization.

151221424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9451347 (or 9451341 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 151221424 is about 12297.2120417597. The cubic root of 151221424 is about 532.7675618352.

Adding to 151221424 its reverse (424122151), we get a palindrome (575343575).

The spelling of 151221424 in words is "one hundred fifty-one million, two hundred twenty-one thousand, four hundred twenty-four".