155520252 has 36 divisors (see below), whose sum is σ = 393513120. Its totient is φ = 51788352.

The previous prime is 155520251. The next prime is 155520259. The reversal of 155520252 is 252025551.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155520251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55624 + ... + 58352.

It is an arithmetic number, because the mean of its divisors is an integer number (10930920).

Almost surely, 2^155520252 is an apocalyptic number.

155520252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155520252 is an abundant number, since it is smaller than the sum of its proper divisors (237992868).

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

155520252 is a wasteful number, since it uses less digits than its factorization.

155520252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322 (or 4317 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 155520252 is about 12470.7759181215. The cubic root of 155520252 is about 537.7688600481.

The spelling of 155520252 in words is "one hundred fifty-five million, five hundred twenty thousand, two hundred fifty-two".