155055243 has 16 divisors (see below), whose sum is σ = 236529920. Its totient is φ = 88507296.

The previous prime is 155055233. The next prime is 155055247. The reversal of 155055243 is 342550551.

It is a happy number.

It is not a de Polignac number, because 155055243 - 2⁴ = 155055227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155055243.

It is not an unprimeable number, because it can be changed into a prime (155055247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18996 + ... + 25902.

It is an arithmetic number, because the mean of its divisors is an integer number (14783120).

Almost surely, 2^155055243 is an apocalyptic number.

155055243 is a deficient number, since it is larger than the sum of its proper divisors (81474677).

155055243 is a wasteful number, since it uses less digits than its factorization.

155055243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 155055243 is about 12452.1180126113. The cubic root of 155055243 is about 537.2323446916.

The spelling of 155055243 in words is "one hundred fifty-five million, fifty-five thousand, two hundred forty-three".