2157101 has 4 divisors (see below), whose sum is σ = 2250912. Its totient is φ = 2063292.

The previous prime is 2157097. The next prime is 2157109. The reversal of 2157101 is 1017512.

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 2157101 - 2² = 2157097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157109) 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, 46871 + ... + 46916.

It is an arithmetic number, because the mean of its divisors is an integer number (562728).

2^2157101 is an apocalyptic number.

It is an amenable number.

2157101 is a deficient number, since it is larger than the sum of its proper divisors (93811).

2157101 is an equidigital number, since it uses as much as digits as its factorization.

2157101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93810.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 2157101 is about 1468.7072546971. The cubic root of 2157101 is about 129.2082248979.

The spelling of 2157101 in words is "two million, one hundred fifty-seven thousand, one hundred one".