155312555 has 8 divisors (see below), whose sum is σ = 196184400. Its totient is φ = 117710496.

The previous prime is 155312543. The next prime is 155312557. The reversal of 155312555 is 555213551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155312555 - 2¹⁴ = 155296171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155312557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817340 + ... + 817529.

It is an arithmetic number, because the mean of its divisors is an integer number (24523050).

Almost surely, 2^155312555 is an apocalyptic number.

155312555 is a deficient number, since it is larger than the sum of its proper divisors (40871845).

155312555 is a wasteful number, since it uses less digits than its factorization.

155312555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634893.

The product of its digits is 18750, while the sum is 32.

The square root of 155312555 is about 12462.4457872442. The cubic root of 155312555 is about 537.5293569688.

The spelling of 155312555 in words is "one hundred fifty-five million, three hundred twelve thousand, five hundred fifty-five".