155522 has 4 divisors (see below), whose sum is σ = 233286. Its totient is φ = 77760.

The previous prime is 155521. The next prime is 155537. The reversal of 155522 is 225551.

155522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225551 = 283 ⋅797.

It can be written as a sum of positive squares in only one way, i.e., 143641 + 11881 = 379^2 + 109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155494 and 155503.

It is not an unprimeable number, because it can be changed into a prime (155521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38879 + ... + 38882.

2¹⁵⁵⁵²² is an apocalyptic number.

155522 is a deficient number, since it is larger than the sum of its proper divisors (77764).

155522 is an equidigital number, since it uses as much as digits as its factorization.

155522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77763.

The product of its digits is 500, while the sum is 20.

The square root of 155522 is about 394.3627771481. The cubic root of 155522 is about 53.7770874826. Note that the first 3 decimals are identical.

The spelling of 155522 in words is "one hundred fifty-five thousand, five hundred twenty-two".