155122117 has 2 divisors, whose sum is σ = 155122118. Its totient is φ = 155122116.

The previous prime is 155122091. The next prime is 155122129. The reversal of 155122117 is 711221551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99380961 + 55741156 = 9969^2 + 7466^2 .

It is a cyclic number.

It is not a de Polignac number, because 155122117 - 2¹⁵ = 155089349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155122091 and 155122100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155122217) 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, 77561058 + 77561059.

It is an arithmetic number, because the mean of its divisors is an integer number (77561059).

Almost surely, 2^155122117 is an apocalyptic number.

It is an amenable number.

155122117 is a deficient number, since it is larger than the sum of its proper divisors (1).

155122117 is an equidigital number, since it uses as much as digits as its factorization.

155122117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 25.

The square root of 155122117 is about 12454.8029691360. The cubic root of 155122117 is about 537.3095681624.

Adding to 155122117 its reverse (711221551), we get a palindrome (866343668).

The spelling of 155122117 in words is "one hundred fifty-five million, one hundred twenty-two thousand, one hundred seventeen".