2135035721 has 8 divisors (see below), whose sum is σ = 2627736384. Its totient is φ = 1689258960.

The previous prime is 2135035717. The next prime is 2135035733. The reversal of 2135035721 is 1275305312.

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 2135035721 - 2² = 2135035717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2135035741) 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, 11730875 + ... + 11731056.

It is an arithmetic number, because the mean of its divisors is an integer number (328467048).

Almost surely, 2^2135035721 is an apocalyptic number.

It is an amenable number.

2135035721 is a deficient number, since it is larger than the sum of its proper divisors (492700663).

2135035721 is a wasteful number, since it uses less digits than its factorization.

2135035721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23461951.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 2135035721 is about 46206.4467471802. The cubic root of 2135035721 is about 1287.6615128513.

The spelling of 2135035721 in words is "two billion, one hundred thirty-five million, thirty-five thousand, seven hundred twenty-one".