56221025447 has 2 divisors, whose sum is σ = 56221025448. Its totient is φ = 56221025446.

The previous prime is 56221025411. The next prime is 56221025473. The reversal of 56221025447 is 74452012265.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56221025447 - 2⁸ = 56221025191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56221025447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56221025347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28110512723 + 28110512724.

It is an arithmetic number, because the mean of its divisors is an integer number (28110512724).

Almost surely, 2^56221025447 is an apocalyptic number.

56221025447 is a deficient number, since it is larger than the sum of its proper divisors (1).

56221025447 is an equidigital number, since it uses as much as digits as its factorization.

56221025447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 56221025447 in words is "fifty-six billion, two hundred twenty-one million, twenty-five thousand, four hundred forty-seven".