2101557671 has 8 divisors (see below), whose sum is σ = 2168402880. Its totient is φ = 2035634688.

The previous prime is 2101557649. The next prime is 2101557701. The reversal of 2101557671 is 1767551012.

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 2101557671 - 2⁶ = 2101557607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101557631) 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, 225926 + ... + 235043.

It is an arithmetic number, because the mean of its divisors is an integer number (271050360).

Almost surely, 2^2101557671 is an apocalyptic number.

2101557671 is a deficient number, since it is larger than the sum of its proper divisors (66845209).

2101557671 is an equidigital number, since it uses as much as digits as its factorization.

2101557671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461113.

The product of its (nonzero) digits is 14700, while the sum is 35.

The square root of 2101557671 is about 45842.7493830813. The cubic root of 2101557671 is about 1280.8957091205.

The spelling of 2101557671 in words is "two billion, one hundred one million, five hundred fifty-seven thousand, six hundred seventy-one".