155242775 has 12 divisors (see below), whose sum is σ = 192751800. Its totient is φ = 124032480.

The previous prime is 155242741. The next prime is 155242799. The reversal of 155242775 is 577242551.

It is not a de Polignac number, because 155242775 - 2⁸ = 155242519 is a prime.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 17861 + ... + 25089.

It is an arithmetic number, because the mean of its divisors is an integer number (16062650).

Almost surely, 2^155242775 is an apocalyptic number.

155242775 is a deficient number, since it is larger than the sum of its proper divisors (37509025).

155242775 is an equidigital number, since it uses as much as digits as its factorization.

155242775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098 (or 8093 counting only the distinct ones).

The product of its digits is 98000, while the sum is 38.

The square root of 155242775 is about 12459.6458617410. The cubic root of 155242775 is about 537.4488431572.

The spelling of 155242775 in words is "one hundred fifty-five million, two hundred forty-two thousand, seven hundred seventy-five".