2181646151 has 16 divisors (see below), whose sum is σ = 2277770880. Its totient is φ = 2087860320.

The previous prime is 2181646123. The next prime is 2181646153. The reversal of 2181646151 is 1516461812.

It is a cyclic number.

It is not a de Polignac number, because 2181646151 - 2¹⁰ = 2181645127 is a prime.

It is a super-2 number, since 2×2181646151² = 9519159856346229602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181646153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 740840 + ... + 743778.

It is an arithmetic number, because the mean of its divisors is an integer number (142360680).

Almost surely, 2^2181646151 is an apocalyptic number.

2181646151 is a deficient number, since it is larger than the sum of its proper divisors (96124729).

2181646151 is a wasteful number, since it uses less digits than its factorization.

2181646151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326.

The product of its digits is 11520, while the sum is 35.

The square root of 2181646151 is about 46708.0951334991. The cubic root of 2181646151 is about 1296.9645452515.

The spelling of 2181646151 in words is "two billion, one hundred eighty-one million, six hundred forty-six thousand, one hundred fifty-one".