1115657216 has 22 divisors (see below), whose sum is σ = 2230226970. Its totient is φ = 557828096.

The previous prime is 1115657209. The next prime is 1115657227. The reversal of 1115657216 is 6127565111.

It can be written as a sum of positive squares in only one way, i.e., 734626816 + 381030400 = 27104^2 + 19520^2 .

It is a super-2 number, since 2×1115657216² = 2489382047225741312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543731 + ... + 545778.

Almost surely, 2^1115657216 is an apocalyptic number.

1115657216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1115657216 is a deficient number, since it is larger than the sum of its proper divisors (1114569754).

1115657216 is an equidigital number, since it uses as much as digits as its factorization.

1115657216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089529 (or 1089511 counting only the distinct ones).

The product of its digits is 12600, while the sum is 35.

The square root of 1115657216 is about 33401.4552976364. The cubic root of 1115657216 is about 1037.1548269854.

The spelling of 1115657216 in words is "one billion, one hundred fifteen million, six hundred fifty-seven thousand, two hundred sixteen".