3215591 has 2 divisors, whose sum is σ = 3215592. Its totient is φ = 3215590.

The previous prime is 3215587. The next prime is 3215593. The reversal of 3215591 is 1955123.

It is a strong prime.

It is an emirp because it is prime and its reverse (1955123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3215591 - 2² = 3215587 is a prime.

Together with 3215593, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3215591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3215593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1607795 + 1607796.

It is an arithmetic number, because the mean of its divisors is an integer number (1607796).

Almost surely, 2^3215591 is an apocalyptic number.

3215591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3215591 is an equidigital number, since it uses as much as digits as its factorization.

3215591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 3215591 is about 1793.2069038457. The cubic root of 3215591 is about 147.6001962135.

The spelling of 3215591 in words is "three million, two hundred fifteen thousand, five hundred ninety-one".