556807481 has 2 divisors, whose sum is σ = 556807482. Its totient is φ = 556807480.

The previous prime is 556807463. The next prime is 556807501. The reversal of 556807481 is 184708655.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538240000 + 18567481 = 23200^2 + 4309^2 .

It is a cyclic number.

It is not a de Polignac number, because 556807481 - 2⁶ = 556807417 is a prime.

It is a super-3 number, since 3×556807481³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (556807411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278403740 + 278403741.

It is an arithmetic number, because the mean of its divisors is an integer number (278403741).

Almost surely, 2^556807481 is an apocalyptic number.

It is an amenable number.

556807481 is a deficient number, since it is larger than the sum of its proper divisors (1).

556807481 is an equidigital number, since it uses as much as digits as its factorization.

556807481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 556807481 is about 23596.7684440052. The cubic root of 556807481 is about 822.6877309123.

The spelling of 556807481 in words is "five hundred fifty-six million, eight hundred seven thousand, four hundred eighty-one".