155242866 has 16 divisors (see below), whose sum is σ = 312346944. Its totient is φ = 51437424.

The previous prime is 155242837. The next prime is 155242873. The reversal of 155242866 is 668242551.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76465 + ... + 78468.

It is an arithmetic number, because the mean of its divisors is an integer number (19521684).

Almost surely, 2^155242866 is an apocalyptic number.

155242866 is an abundant number, since it is smaller than the sum of its proper divisors (157104078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155242866 is a wasteful number, since it uses less digits than its factorization.

155242866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155105.

The product of its digits is 115200, while the sum is 39.

The square root of 155242866 is about 12459.6495135297. The cubic root of 155242866 is about 537.4489481709.

The spelling of 155242866 in words is "one hundred fifty-five million, two hundred forty-two thousand, eight hundred sixty-six".