2196531 has 8 divisors (see below), whose sum is σ = 3254160. Its totient is φ = 1464336.

The previous prime is 2196529. The next prime is 2196539. The reversal of 2196531 is 1356912.

2196531 is a `hidden beast` number, since 2 + 1 + 9 + 653 + 1 = 666.

It is not a de Polignac number, because 2196531 - 2¹ = 2196529 is a prime.

It is a super-2 number, since 2×2196531² = 9649496867922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 81353 = 2196531 / (2 + 1 + 9 + 6 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 2196495 and 2196504.

It is not an unprimeable number, because it can be changed into a prime (2196539) 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, 40650 + ... + 40703.

It is an arithmetic number, because the mean of its divisors is an integer number (406770).

2^2196531 is an apocalyptic number.

2196531 is a deficient number, since it is larger than the sum of its proper divisors (1057629).

2196531 is an equidigital number, since it uses as much as digits as its factorization.

2196531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81362 (or 81356 counting only the distinct ones).

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

The square root of 2196531 is about 1482.0698364112. The cubic root of 2196531 is about 129.9907488486.

The spelling of 2196531 in words is "two million, one hundred ninety-six thousand, five hundred thirty-one".