151551221617 has 2 divisors, whose sum is σ = 151551221618. Its totient is φ = 151551221616.

The previous prime is 151551221611. The next prime is 151551221663. The reversal of 151551221617 is 716122155151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78581544976 + 72969676641 = 280324^2 + 270129^2 .

It is a cyclic number.

It is not a de Polignac number, because 151551221617 - 2³ = 151551221609 is a prime.

It is not a weakly prime, because it can be changed into another prime (151551221611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75775610808 + 75775610809.

It is an arithmetic number, because the mean of its divisors is an integer number (75775610809).

Almost surely, 2^151551221617 is an apocalyptic number.

It is an amenable number.

151551221617 is a deficient number, since it is larger than the sum of its proper divisors (1).

151551221617 is an equidigital number, since it uses as much as digits as its factorization.

151551221617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 37.

Adding to 151551221617 its reverse (716122155151), we get a palindrome (867673376768).

The spelling of 151551221617 in words is "one hundred fifty-one billion, five hundred fifty-one million, two hundred twenty-one thousand, six hundred seventeen".