155941549 has 2 divisors, whose sum is σ = 155941550. Its totient is φ = 155941548.

The previous prime is 155941523. The next prime is 155941567. The reversal of 155941549 is 945149551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 71944324 = 9165^2 + 8482^2 .

It is a cyclic number.

It is not a de Polignac number, because 155941549 - 2⁵ = 155941517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155941519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77970774 + 77970775.

It is an arithmetic number, because the mean of its divisors is an integer number (77970775).

Almost surely, 2^155941549 is an apocalyptic number.

It is an amenable number.

155941549 is a deficient number, since it is larger than the sum of its proper divisors (1).

155941549 is an equidigital number, since it uses as much as digits as its factorization.

155941549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 43.

The square root of 155941549 is about 12487.6558648931. The cubic root of 155941549 is about 538.2540190148.

The spelling of 155941549 in words is "one hundred fifty-five million, nine hundred forty-one thousand, five hundred forty-nine".