155561875 has 60 divisors (see below), whose sum is σ = 235762032. Its totient is φ = 100440000.

The previous prime is 155561851. The next prime is 155561891. The reversal of 155561875 is 578165551.

It is not a de Polignac number, because 155561875 - 2⁹ = 155561363 is a prime.

It is a Duffinian number.

Its product of digits (210000) is a multiple of the sum of its prime divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4204357 + ... + 4204393.

Almost surely, 2^155561875 is an apocalyptic number.

155561875 is a deficient number, since it is larger than the sum of its proper divisors (80200157).

155561875 is an frugal number, since it uses more digits than its factorization.

155561875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 80 counting only the distinct ones).

The product of its digits is 210000, while the sum is 43.

The square root of 155561875 is about 12472.4446280591. Note that the first 3 decimals coincide. The cubic root of 155561875 is about 537.8168314139.

The spelling of 155561875 in words is "one hundred fifty-five million, five hundred sixty-one thousand, eight hundred seventy-five".