2102256457 has 12 divisors (see below), whose sum is σ = 2456461056. Its totient is φ = 1793844360.

The previous prime is 2102256389. The next prime is 2102256469. The reversal of 2102256457 is 7546522012.

It is not a de Polignac number, because 2102256457 - 2¹¹ = 2102254409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2102256757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85269 + ... + 107122.

It is an arithmetic number, because the mean of its divisors is an integer number (204705088).

Almost surely, 2^2102256457 is an apocalyptic number.

It is an amenable number.

2102256457 is a deficient number, since it is larger than the sum of its proper divisors (354204599).

2102256457 is a wasteful number, since it uses less digits than its factorization.

2102256457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192628 (or 192621 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 2102256457 is about 45850.3703038481. The cubic root of 2102256457 is about 1281.0376630013.

Adding to 2102256457 its reverse (7546522012), we get a palindrome (9648778469).

The spelling of 2102256457 in words is "two billion, one hundred two million, two hundred fifty-six thousand, four hundred fifty-seven".