155144899 has 32 divisors (see below), whose sum is σ = 204431360. Its totient is φ = 114307200.

The previous prime is 155144897. The next prime is 155144911. The reversal of 155144899 is 998441551.

It is a happy number.

It is not a de Polignac number, because 155144899 - 2¹ = 155144897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155144897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104734 + ... + 106204.

It is an arithmetic number, because the mean of its divisors is an integer number (6388480).

Almost surely, 2^155144899 is an apocalyptic number.

155144899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155144899 is a deficient number, since it is larger than the sum of its proper divisors (49286461).

155144899 is a wasteful number, since it uses less digits than its factorization.

155144899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571.

The product of its digits is 259200, while the sum is 46.

The square root of 155144899 is about 12455.7175224874. The cubic root of 155144899 is about 537.3358708535.

The spelling of 155144899 in words is "one hundred fifty-five million, one hundred forty-four thousand, eight hundred ninety-nine".