155205612 has 48 divisors (see below), whose sum is σ = 407500800. Its totient is φ = 51077520.

The previous prime is 155205559. The next prime is 155205629. The reversal of 155205612 is 216502551.

155205612 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 (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564 + ... + 17627.

It is an arithmetic number, because the mean of its divisors is an integer number (8489600).

Almost surely, 2^155205612 is an apocalyptic number.

155205612 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 155205612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203750400).

155205612 is an abundant number, since it is smaller than the sum of its proper divisors (252295188).

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

155205612 is a wasteful number, since it uses less digits than its factorization.

155205612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18283 (or 18275 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 155205612 is about 12458.1544379575. The cubic root of 155205612 is about 537.4059537639.

The spelling of 155205612 in words is "one hundred fifty-five million, two hundred five thousand, six hundred twelve".