113215661 has 8 divisors (see below), whose sum is σ = 128341920. Its totient is φ = 99006192.

The previous prime is 113215657. The next prime is 113215667. The reversal of 113215661 is 166512311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113215661 - 2² = 113215657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113215661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113215667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228935 + ... + 229428.

It is an arithmetic number, because the mean of its divisors is an integer number (16042740).

Almost surely, 2^113215661 is an apocalyptic number.

It is an amenable number.

113215661 is a deficient number, since it is larger than the sum of its proper divisors (15126259).

113215661 is a wasteful number, since it uses less digits than its factorization.

113215661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458395.

The product of its digits is 1080, while the sum is 26.

The square root of 113215661 is about 10640.2848176165. The cubic root of 113215661 is about 483.7661783522.

Adding to 113215661 its reverse (166512311), we get a palindrome (279727972).

It can be divided in two parts, 11321 and 5661, that multiplied together give a triangular number (64088181 = T₁₁₃₂₁).

The spelling of 113215661 in words is "one hundred thirteen million, two hundred fifteen thousand, six hundred sixty-one".