1212215255 has 8 divisors (see below), whose sum is σ = 1476370032. Its totient is φ = 955297728.

The previous prime is 1212215233. The next prime is 1212215267. The reversal of 1212215255 is 5525122121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212215255 - 2¹⁸ = 1211953111 is a prime.

It is a Duffinian number.

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, 1808942 + ... + 1809611.

It is an arithmetic number, because the mean of its divisors is an integer number (184546254).

Almost surely, 2^1212215255 is an apocalyptic number.

1212215255 is a deficient number, since it is larger than the sum of its proper divisors (264154777).

1212215255 is an equidigital number, since it uses as much as digits as its factorization.

1212215255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618625.

The product of its digits is 2000, while the sum is 26.

The square root of 1212215255 is about 34816.8817529658. The cubic root of 1212215255 is about 1066.2521380259.

Adding to 1212215255 its reverse (5525122121), we get a palindrome (6737337376).

The spelling of 1212215255 in words is "one billion, two hundred twelve million, two hundred fifteen thousand, two hundred fifty-five".