2256510221506 has 4 divisors (see below), whose sum is σ = 3384765332262. Its totient is φ = 1128255110752.

The previous prime is 2256510221453. The next prime is 2256510221507. The reversal of 2256510221506 is 6051220156522.

2256510221506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 1705137144481 + 551373077025 = 1305809^2 + 742545^2 .

It is a super-2 number, since 2×2256510221506² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2256510221507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564127555375 + ... + 564127555378.

Almost surely, 2^{2256510221506} is an apocalyptic number.

2256510221506 is a deficient number, since it is larger than the sum of its proper divisors (1128255110756).

2256510221506 is a wasteful number, since it uses less digits than its factorization.

2256510221506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128255110755.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 2256510221506 in words is "two trillion, two hundred fifty-six billion, five hundred ten million, two hundred twenty-one thousand, five hundred six".