2051656701 has 4 divisors (see below), whose sum is σ = 2735542272. Its totient is φ = 1367771132.

The previous prime is 2051656699. The next prime is 2051656729. The reversal of 2051656701 is 1076561502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2051656701 - 2¹ = 2051656699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051656801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341942781 + ... + 341942786.

It is an arithmetic number, because the mean of its divisors is an integer number (683885568).

Almost surely, 2^2051656701 is an apocalyptic number.

It is an amenable number.

2051656701 is a deficient number, since it is larger than the sum of its proper divisors (683885571).

2051656701 is an equidigital number, since it uses as much as digits as its factorization.

2051656701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683885570.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 2051656701 is about 45295.2171978455. The cubic root of 2051656701 is about 1270.6762061195.

The spelling of 2051656701 in words is "two billion, fifty-one million, six hundred fifty-six thousand, seven hundred one".