155246149 has 2 divisors, whose sum is σ = 155246150. Its totient is φ = 155246148.

The previous prime is 155246129. The next prime is 155246177. The reversal of 155246149 is 941642551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137124100 + 18122049 = 11710^2 + 4257^2 .

It is an emirp because it is prime and its reverse (941642551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155246149 - 2¹¹ = 155244101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155246129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77623074 + 77623075.

It is an arithmetic number, because the mean of its divisors is an integer number (77623075).

Almost surely, 2^155246149 is an apocalyptic number.

It is an amenable number.

155246149 is a deficient number, since it is larger than the sum of its proper divisors (1).

155246149 is an equidigital number, since it uses as much as digits as its factorization.

155246149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 155246149 is about 12459.7812581120. The cubic root of 155246149 is about 537.4527367131.

The spelling of 155246149 in words is "one hundred fifty-five million, two hundred forty-six thousand, one hundred forty-nine".