155220727 has 8 divisors (see below), whose sum is σ = 165889296. Its totient is φ = 144723072.

The previous prime is 155220683. The next prime is 155220733. The reversal of 155220727 is 727022551.

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 155220727 - 2⁷ = 155220599 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 (155220757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40848 + ... + 44485.

It is an arithmetic number, because the mean of its divisors is an integer number (20736162).

Almost surely, 2^155220727 is an apocalyptic number.

155220727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

155220727 is a deficient number, since it is larger than the sum of its proper divisors (10668569).

155220727 is a wasteful number, since it uses less digits than its factorization.

155220727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85457.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 155220727 is about 12458.7610539732. The cubic root of 155220727 is about 537.4233986385.

The spelling of 155220727 in words is "one hundred fifty-five million, two hundred twenty thousand, seven hundred twenty-seven".