2135277621 has 12 divisors (see below), whose sum is σ = 3142484748. Its totient is φ = 1396659264.

The previous prime is 2135277619. The next prime is 2135277631. The reversal of 2135277621 is 1267725312.

2135277621 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 27 + 7 + 621 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1159402500 + 975875121 = 34050^2 + 31239^2 .

It is not a de Polignac number, because 2135277621 - 2¹ = 2135277619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135277631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2237760 + ... + 2238713.

It is an arithmetic number, because the mean of its divisors is an integer number (261873729).

Almost surely, 2^2135277621 is an apocalyptic number.

It is an amenable number.

2135277621 is a deficient number, since it is larger than the sum of its proper divisors (1007207127).

2135277621 is a wasteful number, since it uses less digits than its factorization.

2135277621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476532 (or 4476529 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 2135277621 is about 46209.0642731488. The cubic root of 2135277621 is about 1287.7101417889.

The spelling of 2135277621 in words is "two billion, one hundred thirty-five million, two hundred seventy-seven thousand, six hundred twenty-one".