151221346 has 8 divisors (see below), whose sum is σ = 228839724. Its totient is φ = 74941440.

The previous prime is 151221299. The next prime is 151221347. The reversal of 151221346 is 643122151.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137241225 + 13980121 = 11715^2 + 3739^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 151221346.

It is not an unprimeable number, because it can be changed into a prime (151221347) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 334335 + ... + 334786.

Almost surely, 2^151221346 is an apocalyptic number.

151221346 is a deficient number, since it is larger than the sum of its proper divisors (77618378).

151221346 is a wasteful number, since it uses less digits than its factorization.

151221346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669236.

The product of its digits is 1440, while the sum is 25.

The square root of 151221346 is about 12297.2088703087. The cubic root of 151221346 is about 532.7674702347.

Adding to 151221346 its reverse (643122151), we get a palindrome (794343497).

The spelling of 151221346 in words is "one hundred fifty-one million, two hundred twenty-one thousand, three hundred forty-six".