151232009 has 2 divisors, whose sum is σ = 151232010. Its totient is φ = 151232008.

The previous prime is 151231999. The next prime is 151232057. The reversal of 151232009 is 900232151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144841225 + 6390784 = 12035^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 151232009 - 2¹² = 151227913 is a prime.

It is a super-2 number, since 2×151232009² = 45742241092352162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151232089) 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 as a sum of consecutive naturals, namely, 75616004 + 75616005.

It is an arithmetic number, because the mean of its divisors is an integer number (75616005).

Almost surely, 2^151232009 is an apocalyptic number.

It is an amenable number.

151232009 is a deficient number, since it is larger than the sum of its proper divisors (1).

151232009 is an equidigital number, since it uses as much as digits as its factorization.

151232009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 151232009 is about 12297.6424163333. The cubic root of 151232009 is about 532.7799922015.

The spelling of 151232009 in words is "one hundred fifty-one million, two hundred thirty-two thousand, nine".