155060561 has 4 divisors (see below), whose sum is σ = 155102052. Its totient is φ = 155019072.

The previous prime is 155060551. The next prime is 155060569. The reversal of 155060561 is 165060551.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39627025 + 115433536 = 6295^2 + 10744^2 .

It is a cyclic number.

It is not a de Polignac number, because 155060561 - 2⁶ = 155060497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155060569) 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, 14516 + ... + 22821.

It is an arithmetic number, because the mean of its divisors is an integer number (38775513).

Almost surely, 2^155060561 is an apocalyptic number.

It is an amenable number.

155060561 is a deficient number, since it is larger than the sum of its proper divisors (41491).

155060561 is an equidigital number, since it uses as much as digits as its factorization.

155060561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41490.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 155060561 is about 12452.3315487502. The cubic root of 155060561 is about 537.2384865219.

The spelling of 155060561 in words is "one hundred fifty-five million, sixty thousand, five hundred sixty-one".