155143555 has 24 divisors (see below), whose sum is σ = 217142640. Its totient is φ = 106102080.

The previous prime is 155143537. The next prime is 155143589. The reversal of 155143555 is 555341551.

It is not a de Polignac number, because 155143555 - 2²⁵ = 121589123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155143555.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139341 + ... + 140449.

It is an arithmetic number, because the mean of its divisors is an integer number (9047610).

Almost surely, 2^155143555 is an apocalyptic number.

155143555 is a deficient number, since it is larger than the sum of its proper divisors (61999085).

155143555 is a wasteful number, since it uses less digits than its factorization.

155143555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699 (or 1692 counting only the distinct ones).

The product of its digits is 37500, while the sum is 34.

The square root of 155143555 is about 12455.6635712434. The cubic root of 155143555 is about 537.3343192255.

The spelling of 155143555 in words is "one hundred fifty-five million, one hundred forty-three thousand, five hundred fifty-five".