155949312 has 72 divisors (see below), whose sum is σ = 417221280. Its totient is φ = 51712000.

The previous prime is 155949307. The next prime is 155949319. The reversal of 155949312 is 213949551.

It is not an unprimeable number, because it can be changed into a prime (155949319) 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, 192364 + ... + 193172.

It is an arithmetic number, because the mean of its divisors is an integer number (5794740).

Almost surely, 2^155949312 is an apocalyptic number.

155949312 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 155949312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208610640).

155949312 is an abundant number, since it is smaller than the sum of its proper divisors (261271968).

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

155949312 is an equidigital number, since it uses as much as digits as its factorization.

155949312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1065 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 155949312 is about 12487.9666879761. The cubic root of 155949312 is about 538.2629505593.

The spelling of 155949312 in words is "one hundred fifty-five million, nine hundred forty-nine thousand, three hundred twelve".