151221551549 has 2 divisors, whose sum is σ = 151221551550. Its totient is φ = 151221551548.

The previous prime is 151221551543. The next prime is 151221551563. The reversal of 151221551549 is 945155122151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128271422500 + 22950129049 = 358150^2 + 151493^2 .

It is a cyclic number.

It is not a de Polignac number, because 151221551549 - 2¹² = 151221547453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151221551543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75610775774 + 75610775775.

It is an arithmetic number, because the mean of its divisors is an integer number (75610775775).

Almost surely, 2^151221551549 is an apocalyptic number.

It is an amenable number.

151221551549 is a deficient number, since it is larger than the sum of its proper divisors (1).

151221551549 is an equidigital number, since it uses as much as digits as its factorization.

151221551549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90000, while the sum is 41.

The spelling of 151221551549 in words is "one hundred fifty-one billion, two hundred twenty-one million, five hundred fifty-one thousand, five hundred forty-nine".