155312552212 has 24 divisors (see below), whose sum is σ = 273515760896. Its totient is φ = 77166468288.

The previous prime is 155312552209. The next prime is 155312552243. The reversal of 155312552212 is 212255213551.

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, 328768 + ... + 647080.

Almost surely, 2^155312552212 is an apocalyptic number.

It is an amenable number.

155312552212 is a deficient number, since it is larger than the sum of its proper divisors (118203208684).

155312552212 is a wasteful number, since it uses less digits than its factorization.

155312552212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319087 (or 319085 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

Adding to 155312552212 its reverse (212255213551), we get a palindrome (367567765763).

The spelling of 155312552212 in words is "one hundred fifty-five billion, three hundred twelve million, five hundred fifty-two thousand, two hundred twelve".