2421334155257 has 4 divisors (see below), whose sum is σ = 2421431465460. Its totient is φ = 2421236845056.

The previous prime is 2421334155241. The next prime is 2421334155259. The reversal of 2421334155257 is 7525514331242.

It is a happy number.

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 56594506816 + 2364739648441 = 237896^2 + 1537771^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421334155257 - 2⁴ = 2421334155241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421334155259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48617768 + ... + 48667545.

It is an arithmetic number, because the mean of its divisors is an integer number (605357866365).

Almost surely, 2^{2421334155257} is an apocalyptic number.

It is an amenable number.

2421334155257 is a deficient number, since it is larger than the sum of its proper divisors (97310203).

2421334155257 is an equidigital number, since it uses as much as digits as its factorization.

2421334155257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97310202.

The product of its digits is 1008000, while the sum is 44.

Adding to 2421334155257 its reverse (7525514331242), we get a palindrome (9946848486499).

The spelling of 2421334155257 in words is "two trillion, four hundred twenty-one billion, three hundred thirty-four million, one hundred fifty-five thousand, two hundred fifty-seven".