1215717116 has 12 divisors (see below), whose sum is σ = 2127810888. Its totient is φ = 607771152.

The previous prime is 1215717079. The next prime is 1215717119. The reversal of 1215717116 is 6117175121.

It is a super-2 number, since 2×1215717116² = 2955936212270714912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215717119) 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, 17195 + ... + 52221.

It is an arithmetic number, because the mean of its divisors is an integer number (177317574).

Almost surely, 2^1215717116 is an apocalyptic number.

It is an amenable number.

1215717116 is a deficient number, since it is larger than the sum of its proper divisors (912093772).

1215717116 is a wasteful number, since it uses less digits than its factorization.

1215717116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43708 (or 43706 counting only the distinct ones).

The product of its digits is 2940, while the sum is 32.

The square root of 1215717116 is about 34867.1351848700. The cubic root of 1215717116 is about 1067.2778846341.

The spelling of 1215717116 in words is "one billion, two hundred fifteen million, seven hundred seventeen thousand, one hundred sixteen".