1215154136 has 48 divisors (see below), whose sum is σ = 2653413840. Its totient is φ = 520188480.

The previous prime is 1215154123. The next prime is 1215154181. The reversal of 1215154136 is 6314515121.

It is a junction number, because it is equal to n+sod(n) for n = 1215154099 and 1215154108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 662741 + ... + 664571.

It is an arithmetic number, because the mean of its divisors is an integer number (55279455).

Almost surely, 2^1215154136 is an apocalyptic number.

It is an amenable number.

1215154136 is an abundant number, since it is smaller than the sum of its proper divisors (1438259704).

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

1215154136 is a wasteful number, since it uses less digits than its factorization.

1215154136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3544 (or 3533 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 1215154136 is about 34859.0610315310. The cubic root of 1215154136 is about 1067.1131125095.

Adding to 1215154136 its reverse (6314515121), we get a palindrome (7529669257).

The spelling of 1215154136 in words is "one billion, two hundred fifteen million, one hundred fifty-four thousand, one hundred thirty-six".