155442253322212 has 12 divisors (see below), whose sum is σ = 272084218981036. Its totient is φ = 77703905041920.

The previous prime is 155442253322203. The next prime is 155442253322219. The reversal of 155442253322212 is 212223352244551.

It can be written as a sum of positive squares in 2 ways, for example, as 58211925346276 + 97230327975936 = 7629674^2 + 9860544^2 .

It is not an unprimeable number, because it can be changed into a prime (155442253322219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305384489 + ... + 4305420592.

Almost surely, 2^{155442253322212} is an apocalyptic number.

It is an amenable number.

155442253322212 is a deficient number, since it is larger than the sum of its proper divisors (116641965658824).

155442253322212 is a wasteful number, since it uses less digits than its factorization.

155442253322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8610809598 (or 8610809596 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 43.

The spelling of 155442253322212 in words is "one hundred fifty-five trillion, four hundred forty-two billion, two hundred fifty-three million, three hundred twenty-two thousand, two hundred twelve".