2031569 has 2 divisors, whose sum is σ = 2031570. Its totient is φ = 2031568.

The previous prime is 2031563. The next prime is 2031571. The reversal of 2031569 is 9651302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 543169 = 1220^2 + 737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2031569 is a prime.

It is a super-2 number, since 2×2031569² = 8254545203522, which contains 22 as substring.

Together with 2031571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2031563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015784 + 1015785.

It is an arithmetic number, because the mean of its divisors is an integer number (1015785).

2^2031569 is an apocalyptic number.

It is an amenable number.

2031569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031569 is an equidigital number, since it uses as much as digits as its factorization.

2031569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2031569 is about 1425.3311895837. The cubic root of 2031569 is about 126.6515548300.

The spelling of 2031569 in words is "two million, thirty-one thousand, five hundred sixty-nine".