155520155 has 8 divisors (see below), whose sum is σ = 213284832. Its totient is φ = 106642368.

The previous prime is 155520143. The next prime is 155520161. The reversal of 155520155 is 551025551.

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

It is not a de Polignac number, because 155520155 - 2¹⁰ = 155519131 is a prime.

It is a super-2 number, since 2×155520155² = 48373037222448050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2221682 + ... + 2221751.

It is an arithmetic number, because the mean of its divisors is an integer number (26660604).

Almost surely, 2^155520155 is an apocalyptic number.

155520155 is a deficient number, since it is larger than the sum of its proper divisors (57764677).

155520155 is an equidigital number, since it uses as much as digits as its factorization.

155520155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443445.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 155520155 is about 12470.7720290285. The cubic root of 155520155 is about 537.7687482436.

The spelling of 155520155 in words is "one hundred fifty-five million, five hundred twenty thousand, one hundred fifty-five".