155551144 has 16 divisors (see below), whose sum is σ = 333324000. Its totient is φ = 66664752.

The previous prime is 155551141. The next prime is 155551177. The reversal of 155551144 is 441155551.

It is not an unprimeable number, because it can be changed into a prime (155551141) 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 3 ways as a sum of consecutive naturals, for example, 1388794 + ... + 1388905.

It is an arithmetic number, because the mean of its divisors is an integer number (20832750).

Almost surely, 2^155551144 is an apocalyptic number.

155551144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155551144 is an abundant number, since it is smaller than the sum of its proper divisors (177772856).

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

155551144 is a wasteful number, since it uses less digits than its factorization.

155551144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777712 (or 2777708 counting only the distinct ones).

The product of its digits is 10000, while the sum is 31.

The square root of 155551144 is about 12472.0144323201. The cubic root of 155551144 is about 537.8044645339.

The spelling of 155551144 in words is "one hundred fifty-five million, five hundred fifty-one thousand, one hundred forty-four".