1235218215 has 288 divisors, whose sum is σ = 2881992960. Its totient is φ = 447068160.

The previous prime is 1235218213. The next prime is 1235218217. The reversal of 1235218215 is 5128125321.

It is an interprime number because it is at equal distance from previous prime (1235218213) and next prime (1235218217).

It is not a de Polignac number, because 1235218215 - 2¹ = 1235218213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235218213) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 28725984 + ... + 28726026.

It is an arithmetic number, because the mean of its divisors is an integer number (10006920).

Almost surely, 2^1235218215 is an apocalyptic number.

1235218215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1235218215 is an abundant number, since it is smaller than the sum of its proper divisors (1646774745).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1235218215 is a wasteful number, since it uses less digits than its factorization.

1235218215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 105 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 1235218215 is about 35145.6713550901. The cubic root of 1235218215 is about 1072.9543111426.

The spelling of 1235218215 in words is "one billion, two hundred thirty-five million, two hundred eighteen thousand, two hundred fifteen".