155198827 has 12 divisors (see below), whose sum is σ = 181483896. Its totient is φ = 132330240.

The previous prime is 155198809. The next prime is 155198837. The reversal of 155198827 is 728891551.

It is not a de Polignac number, because 155198827 - 2¹¹ = 155196779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155198837) by changing a digit.

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, 1252 + ... + 17662.

It is an arithmetic number, because the mean of its divisors is an integer number (15123658).

Almost surely, 2^155198827 is an apocalyptic number.

155198827 is a deficient number, since it is larger than the sum of its proper divisors (26285069).

155198827 is a wasteful number, since it uses less digits than its factorization.

155198827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16618 (or 16611 counting only the distinct ones).

The product of its digits is 201600, while the sum is 46.

The square root of 155198827 is about 12457.8821233788. The cubic root of 155198827 is about 537.3981225339.

It can be divided in two parts, 155198 and 827, that added together give a square (156025 = 395²).

The spelling of 155198827 in words is "one hundred fifty-five million, one hundred ninety-eight thousand, eight hundred twenty-seven".