155223552 has 80 divisors (see below), whose sum is σ = 451167552. Its totient is φ = 47032320.

The previous prime is 155223533. The next prime is 155223587. The reversal of 155223552 is 255322551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12303 + ... + 21489.

Almost surely, 2^155223552 is an apocalyptic number.

155223552 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 155223552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225583776).

155223552 is an abundant number, since it is smaller than the sum of its proper divisors (295944000).

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

155223552 is an equidigital number, since it uses as much as digits as its factorization.

155223552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219 (or 9203 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 155223552 is about 12458.8744274914. The cubic root of 155223552 is about 537.4266589674.

The spelling of 155223552 in words is "one hundred fifty-five million, two hundred twenty-three thousand, five hundred fifty-two".