155438137 has 2 divisors, whose sum is σ = 155438138. Its totient is φ = 155438136.

The previous prime is 155438131. The next prime is 155438159. The reversal of 155438137 is 731834551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114682681 + 40755456 = 10709^2 + 6384^2 .

It is a cyclic number.

It is not a de Polignac number, because 155438137 - 2¹¹ = 155436089 is a prime.

It is a super-2 number, since 2×155438137² = 48322028868061538, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155438096 and 155438105.

It is not a weakly prime, because it can be changed into another prime (155438131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77719068 + 77719069.

It is an arithmetic number, because the mean of its divisors is an integer number (77719069).

Almost surely, 2^155438137 is an apocalyptic number.

It is an amenable number.

155438137 is a deficient number, since it is larger than the sum of its proper divisors (1).

155438137 is an equidigital number, since it uses as much as digits as its factorization.

155438137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 155438137 is about 12467.4831862730. The cubic root of 155438137 is about 537.6741957120.

The spelling of 155438137 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, one hundred thirty-seven".