155717216 has 48 divisors (see below), whose sum is σ = 320624640. Its totient is φ = 74355840.

The previous prime is 155717209. The next prime is 155717227. The reversal of 155717216 is 612717551.

It is a congruent 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, 77375 + ... + 79361.

It is an arithmetic number, because the mean of its divisors is an integer number (6679680).

Almost surely, 2^155717216 is an apocalyptic number.

155717216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155717216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160312320).

155717216 is an abundant number, since it is smaller than the sum of its proper divisors (164907424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155717216 is a wasteful number, since it uses less digits than its factorization.

155717216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2099 counting only the distinct ones).

The product of its digits is 14700, while the sum is 35.

The square root of 155717216 is about 12478.6704419982. The cubic root of 155717216 is about 537.9957895959.

The spelling of 155717216 in words is "one hundred fifty-five million, seven hundred seventeen thousand, two hundred sixteen".