155532061 has 2 divisors, whose sum is σ = 155532062. Its totient is φ = 155532060.

The previous prime is 155532059. The next prime is 155532079. The reversal of 155532061 is 160235551.

155532061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116856100 + 38675961 = 10810^2 + 6219^2 .

It is a cyclic number.

It is not a de Polignac number, because 155532061 - 2¹ = 155532059 is a prime.

Together with 155532059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155532361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77766030 + 77766031.

It is an arithmetic number, because the mean of its divisors is an integer number (77766031).

Almost surely, 2^155532061 is an apocalyptic number.

It is an amenable number.

155532061 is a deficient number, since it is larger than the sum of its proper divisors (1).

155532061 is an equidigital number, since it uses as much as digits as its factorization.

155532061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 155532061 is about 12471.2493760649. The cubic root of 155532061 is about 537.7824710337.

The spelling of 155532061 in words is "one hundred fifty-five million, five hundred thirty-two thousand, sixty-one".