1215229272 has 16 divisors (see below), whose sum is σ = 3038073240. Its totient is φ = 405076416.

The previous prime is 1215229261. The next prime is 1215229277. The reversal of 1215229272 is 2729225121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215229277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25317253 + ... + 25317300.

Almost surely, 2^1215229272 is an apocalyptic number.

1215229272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215229272 is an abundant number, since it is smaller than the sum of its proper divisors (1822843968).

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

1215229272 is a wasteful number, since it uses less digits than its factorization.

1215229272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50634562 (or 50634558 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 1215229272 is about 34860.1387260579. The cubic root of 1215229272 is about 1067.1351061414.

The spelling of 1215229272 in words is "one billion, two hundred fifteen million, two hundred twenty-nine thousand, two hundred seventy-two".