75000155 has 4 divisors (see below), whose sum is σ = 90000192. Its totient is φ = 60000120.

The previous prime is 75000143. The next prime is 75000157. The reversal of 75000155 is 55100057.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 75000155 - 2¹⁰ = 74999131 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 75000155.

It is not an unprimeable number, because it can be changed into a prime (75000157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7500011 + ... + 7500020.

It is an arithmetic number, because the mean of its divisors is an integer number (22500048).

Almost surely, 2^75000155 is an apocalyptic number.

75000155 is a deficient number, since it is larger than the sum of its proper divisors (15000037).

75000155 is a wasteful number, since it uses less digits than its factorization.

75000155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000036.

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 75000155 is about 8660.2629867689. The cubic root of 75000155 is about 421.7166231664.

The spelling of 75000155 in words is "seventy-five million, one hundred fifty-five", and thus it is an aban number.