155224669 has 2 divisors, whose sum is σ = 155224670. Its totient is φ = 155224668.

The previous prime is 155224639. The next prime is 155224679. The reversal of 155224669 is 966422551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136188900 + 19035769 = 11670^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 155224669 - 2²⁷ = 21006941 is a prime.

It is a super-2 number, since 2×155224669² = 48189395732319122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155224609) 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, 77612334 + 77612335.

It is an arithmetic number, because the mean of its divisors is an integer number (77612335).

Almost surely, 2^155224669 is an apocalyptic number.

It is an amenable number.

155224669 is a deficient number, since it is larger than the sum of its proper divisors (1).

155224669 is an equidigital number, since it uses as much as digits as its factorization.

155224669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 155224669 is about 12458.9192548953. The cubic root of 155224669 is about 537.4279480848.

The spelling of 155224669 in words is "one hundred fifty-five million, two hundred twenty-four thousand, six hundred sixty-nine".