155108772 has 144 divisors (see below), whose sum is σ = 487992960. Its totient is φ = 40449024.

The previous prime is 155108743. The next prime is 155108777. The reversal of 155108772 is 277801551.

155108772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (155108777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369979 + ... + 370397.

It is an arithmetic number, because the mean of its divisors is an integer number (3388840).

Almost surely, 2^155108772 is an apocalyptic number.

155108772 is a gapful number since it is divisible by the number (12) 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 155108772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243996480).

155108772 is an abundant number, since it is smaller than the sum of its proper divisors (332884188).

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

155108772 is a wasteful number, since it uses less digits than its factorization.

155108772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 155108772 is about 12454.2672205152. The cubic root of 155108772 is about 537.2941596529.

The spelling of 155108772 in words is "one hundred fifty-five million, one hundred eight thousand, seven hundred seventy-two".