155500559 has 4 divisors (see below), whose sum is σ = 155561616. Its totient is φ = 155439504.

The previous prime is 155500511. The next prime is 155500607. The reversal of 155500559 is 955005551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955005551 = 29789 ⋅32059.

It is an interprime number because it is at equal distance from previous prime (155500511) and next prime (155500607).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155500559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155500759) 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, 26534 + ... + 31859.

It is an arithmetic number, because the mean of its divisors is an integer number (38890404).

Almost surely, 2^155500559 is an apocalyptic number.

155500559 is a deficient number, since it is larger than the sum of its proper divisors (61057).

155500559 is an equidigital number, since it uses as much as digits as its factorization.

155500559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61056.

The product of its (nonzero) digits is 28125, while the sum is 35.

The square root of 155500559 is about 12469.9863271777. The cubic root of 155500559 is about 537.7461604767.

The spelling of 155500559 in words is "one hundred fifty-five million, five hundred thousand, five hundred fifty-nine".