155575812 has 96 divisors (see below), whose sum is σ = 429004800. Its totient is φ = 42958080.

The previous prime is 155575793. The next prime is 155575813. The reversal of 155575812 is 218575551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155575813) 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 31 ways as a sum of consecutive naturals, for example, 685243 + ... + 685469.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800).

Almost surely, 2^155575812 is an apocalyptic number.

155575812 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 155575812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214502400).

155575812 is an abundant number, since it is smaller than the sum of its proper divisors (273428988).

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

155575812 is a wasteful number, since it uses less digits than its factorization.

155575812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 479 counting only the distinct ones).

The product of its digits is 70000, while the sum is 39.

The square root of 155575812 is about 12473.0033271863. The cubic root of 155575812 is about 537.8328921814.

The spelling of 155575812 in words is "one hundred fifty-five million, five hundred seventy-five thousand, eight hundred twelve".