2421311657 has 4 divisors (see below), whose sum is σ = 2425941840. Its totient is φ = 2416681476.

The previous prime is 2421311611. The next prime is 2421311663. The reversal of 2421311657 is 7561131242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2421311657 - 2¹² = 2421307561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421311257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314307 + ... + 2315352.

It is an arithmetic number, because the mean of its divisors is an integer number (606485460).

Almost surely, 2^2421311657 is an apocalyptic number.

It is an amenable number.

2421311657 is a deficient number, since it is larger than the sum of its proper divisors (4630183).

2421311657 is an equidigital number, since it uses as much as digits as its factorization.

2421311657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630182.

The product of its digits is 10080, while the sum is 32.

The square root of 2421311657 is about 49206.8253090971. The cubic root of 2421311657 is about 1342.8172067447.

Adding to 2421311657 its reverse (7561131242), we get a palindrome (9982442899).

The spelling of 2421311657 in words is "two billion, four hundred twenty-one million, three hundred eleven thousand, six hundred fifty-seven".