2193557 has 2 divisors, whose sum is σ = 2193558. Its totient is φ = 2193556.

The previous prime is 2193553. The next prime is 2193599. The reversal of 2193557 is 7553912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2193361 + 196 = 1481^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 2193557 - 2² = 2193553 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096778 + 1096779.

It is an arithmetic number, because the mean of its divisors is an integer number (1096779).

2^2193557 is an apocalyptic number.

It is an amenable number.

2193557 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193557 is an equidigital number, since it uses as much as digits as its factorization.

2193557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 32.

The square root of 2193557 is about 1481.0661700275. The cubic root of 2193557 is about 129.9320552245.

The spelling of 2193557 in words is "two million, one hundred ninety-three thousand, five hundred fifty-seven".