155201212 has 24 divisors (see below), whose sum is σ = 279467216. Its totient is φ = 75385728.

The previous prime is 155201201. The next prime is 155201213. The reversal of 155201212 is 212102551.

It is a self number, because there is not a number n which added to its sum of digits gives 155201212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155201213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15598 + ... + 23530.

Almost surely, 2^155201212 is an apocalyptic number.

It is an amenable number.

155201212 is a deficient number, since it is larger than the sum of its proper divisors (124266004).

155201212 is a wasteful number, since it uses less digits than its factorization.

155201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8077 (or 8075 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 155201212 is about 12457.9778455414. The cubic root of 155201212 is about 537.4008753209.

Adding to 155201212 its reverse (212102551), we get a palindrome (367303763).

The spelling of 155201212 in words is "one hundred fifty-five million, two hundred one thousand, two hundred twelve".