151221146 has 16 divisors (see below), whose sum is σ = 235590120. Its totient is φ = 72737280.

The previous prime is 151221127. The next prime is 151221197. The reversal of 151221146 is 641122151.

It can be written as a sum of positive squares in 4 ways, for example, as 143161225 + 8059921 = 11965^2 + 2839^2 .

It is an unprimeable number.

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, 4895 + ... + 18066.

Almost surely, 2^151221146 is an apocalyptic number.

151221146 is a deficient number, since it is larger than the sum of its proper divisors (84368974).

151221146 is a wasteful number, since it uses less digits than its factorization.

151221146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23089.

The product of its digits is 480, while the sum is 23.

The square root of 151221146 is about 12297.2007383794. The cubic root of 151221146 is about 532.7672353614.

Adding to 151221146 its reverse (641122151), we get a palindrome (792343297).

The spelling of 151221146 in words is "one hundred fifty-one million, two hundred twenty-one thousand, one hundred forty-six".