2317621 has 4 divisors (see below), whose sum is σ = 2341612. Its totient is φ = 2293632.

The previous prime is 2317619. The next prime is 2317631. The reversal of 2317621 is 1267132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 656100 = 1289^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2317621 - 2¹ = 2317619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2317592 and 2317601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2317631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11850 + ... + 12043.

It is an arithmetic number, because the mean of its divisors is an integer number (585403).

2^2317621 is an apocalyptic number.

It is an amenable number.

2317621 is a deficient number, since it is larger than the sum of its proper divisors (23991).

2317621 is an equidigital number, since it uses as much as digits as its factorization.

2317621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23990.

The product of its digits is 504, while the sum is 22.

The square root of 2317621 is about 1522.3734758593. The cubic root of 2317621 is about 132.3368539072.

The spelling of 2317621 in words is "two million, three hundred seventeen thousand, six hundred twenty-one".