155736220 has 48 divisors (see below), whose sum is σ = 345461760. Its totient is φ = 58853696.

The previous prime is 155736211. The next prime is 155736221. The reversal of 155736220 is 22637551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155736221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36141 + ... + 40219.

It is an arithmetic number, because the mean of its divisors is an integer number (7197120).

Almost surely, 2^155736220 is an apocalyptic number.

155736220 is a gapful number since it is divisible by the number (10) 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 155736220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172730880).

155736220 is an abundant number, since it is smaller than the sum of its proper divisors (189725540).

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

155736220 is a wasteful number, since it uses less digits than its factorization.

155736220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 155736220 is about 12479.4318780945. The cubic root of 155736220 is about 538.0176746864.

The spelling of 155736220 in words is "one hundred fifty-five million, seven hundred thirty-six thousand, two hundred twenty".