2135372181 has 8 divisors (see below), whose sum is σ = 2868897504. Its totient is φ = 1412714160.

The previous prime is 2135372179. The next prime is 2135372201. The reversal of 2135372181 is 1812735312.

It is a happy number.

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

It is not a de Polignac number, because 2135372181 - 2¹ = 2135372179 is a prime.

It is a super-2 number, since 2×2135372181² = 9119628702777393522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135332181) 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, 2716366 + ... + 2717151.

It is an arithmetic number, because the mean of its divisors is an integer number (358612188).

Almost surely, 2^2135372181 is an apocalyptic number.

It is an amenable number.

2135372181 is a deficient number, since it is larger than the sum of its proper divisors (733525323).

2135372181 is a wasteful number, since it uses less digits than its factorization.

2135372181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433651.

The product of its digits is 10080, while the sum is 33.

The square root of 2135372181 is about 46210.0874377013. The cubic root of 2135372181 is about 1287.7291501015.

The spelling of 2135372181 in words is "two billion, one hundred thirty-five million, three hundred seventy-two thousand, one hundred eighty-one".