2193561 has 32 divisors (see below), whose sum is σ = 3542400. Its totient is φ = 1353024.

The previous prime is 2193557. The next prime is 2193599. The reversal of 2193561 is 1653912.

It is not a de Polignac number, because 2193561 - 2² = 2193557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2193661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37150 + ... + 37208.

It is an arithmetic number, because the mean of its divisors is an integer number (110700).

2^2193561 is an apocalyptic number.

It is an amenable number.

2193561 is a deficient number, since it is larger than the sum of its proper divisors (1348839).

2193561 is an frugal number, since it uses more digits than its factorization.

2193561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 79 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2193561 is about 1481.0675204055. The cubic root of 2193561 is about 129.9321342024.

The spelling of 2193561 in words is "two million, one hundred ninety-three thousand, five hundred sixty-one".