155015255 has 4 divisors (see below), whose sum is σ = 186018312. Its totient is φ = 124012200.

The previous prime is 155015251. The next prime is 155015261. The reversal of 155015255 is 552510551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552510551 = 31 ⋅17822921.

It is not a de Polignac number, because 155015255 - 2² = 155015251 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 (155015251) 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, 15501521 + ... + 15501530.

It is an arithmetic number, because the mean of its divisors is an integer number (46504578).

Almost surely, 2^155015255 is an apocalyptic number.

155015255 is a deficient number, since it is larger than the sum of its proper divisors (31003057).

155015255 is an equidigital number, since it uses as much as digits as its factorization.

155015255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31003056.

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

The square root of 155015255 is about 12450.5122384583. The cubic root of 155015255 is about 537.1861575099.

The spelling of 155015255 in words is "one hundred fifty-five million, fifteen thousand, two hundred fifty-five".