2319521 has 2 divisors, whose sum is σ = 2319522. Its totient is φ = 2319520.

The previous prime is 2319517. The next prime is 2319533. The reversal of 2319521 is 1259132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 102400 = 1489^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2319521 - 2² = 2319517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2319221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159760 + 1159761.

It is an arithmetic number, because the mean of its divisors is an integer number (1159761).

2^2319521 is an apocalyptic number.

It is an amenable number.

2319521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2319521 is an equidigital number, since it uses as much as digits as its factorization.

2319521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 2319521 is about 1522.9973736025. The cubic root of 2319521 is about 132.3730075525.

The spelling of 2319521 in words is "two million, three hundred nineteen thousand, five hundred twenty-one".