155115061 has 4 divisors (see below), whose sum is σ = 158722432. Its totient is φ = 151507692.

The previous prime is 155115043. The next prime is 155115073. The reversal of 155115061 is 160511551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155115061 - 2⁷ = 155114933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155115761) 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 in 3 ways as a sum of consecutive naturals, for example, 1803621 + ... + 1803706.

It is an arithmetic number, because the mean of its divisors is an integer number (39680608).

Almost surely, 2^155115061 is an apocalyptic number.

It is an amenable number.

155115061 is a deficient number, since it is larger than the sum of its proper divisors (3607371).

155115061 is an equidigital number, since it uses as much as digits as its factorization.

155115061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607370.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 155115061 is about 12454.5197016987. The cubic root of 155115061 is about 537.3014212180.

The spelling of 155115061 in words is "one hundred fifty-five million, one hundred fifteen thousand, sixty-one".