9215612881 has 8 divisors (see below), whose sum is σ = 9397217984. Its totient is φ = 9034992720.

The previous prime is 9215612873. The next prime is 9215612893. The reversal of 9215612881 is 1882165129.

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 9215612881 - 2³ = 9215612873 is a prime.

It is a super-2 number, since 2×9215612881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9215612831) 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, 227325 + ... + 264778.

It is an arithmetic number, because the mean of its divisors is an integer number (1174652248).

Almost surely, 2^9215612881 is an apocalyptic number.

It is an amenable number.

9215612881 is a deficient number, since it is larger than the sum of its proper divisors (181605103).

9215612881 is a wasteful number, since it uses less digits than its factorization.

9215612881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492471.

The product of its digits is 69120, while the sum is 43.

The square root of 9215612881 is about 95997.9837340347. The cubic root of 9215612881 is about 2096.5637590884.

The spelling of 9215612881 in words is "nine billion, two hundred fifteen million, six hundred twelve thousand, eight hundred eighty-one".