155542322212 has 6 divisors (see below), whose sum is σ = 272199063878. Its totient is φ = 77771161104.

The previous prime is 155542322197. The next prime is 155542322279. The reversal of 155542322212 is 212223245551.

It can be written as a sum of positive squares in only one way, i.e., 104210169856 + 51332152356 = 322816^2 + 226566^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19442790273 + ... + 19442790280.

Almost surely, 2^155542322212 is an apocalyptic number.

It is an amenable number.

155542322212 is a deficient number, since it is larger than the sum of its proper divisors (116656741666).

155542322212 is a wasteful number, since it uses less digits than its factorization.

155542322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38885580557 (or 38885580555 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

Adding to 155542322212 its reverse (212223245551), we get a palindrome (367765567763).

The spelling of 155542322212 in words is "one hundred fifty-five billion, five hundred forty-two million, three hundred twenty-two thousand, two hundred twelve".