2420355257 has 4 divisors (see below), whose sum is σ = 2422659216. Its totient is φ = 2418051300.

The previous prime is 2420355239. The next prime is 2420355269. The reversal of 2420355257 is 7525530242.

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 2420355257 - 2¹⁴ = 2420338873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2420355557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150403 + ... + 1152504.

It is an arithmetic number, because the mean of its divisors is an integer number (605664804).

Almost surely, 2^2420355257 is an apocalyptic number.

It is an amenable number.

2420355257 is a deficient number, since it is larger than the sum of its proper divisors (2303959).

2420355257 is a wasteful number, since it uses less digits than its factorization.

2420355257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303958.

The product of its (nonzero) digits is 84000, while the sum is 35.

The square root of 2420355257 is about 49197.1061852219. The cubic root of 2420355257 is about 1342.6403825425.

Adding to 2420355257 its reverse (7525530242), we get a palindrome (9945885499).

The spelling of 2420355257 in words is "two billion, four hundred twenty million, three hundred fifty-five thousand, two hundred fifty-seven".