56217401 has 2 divisors, whose sum is σ = 56217402. Its totient is φ = 56217400.

The previous prime is 56217391. The next prime is 56217407. The reversal of 56217401 is 10471265.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 7706176 = 6965^2 + 2776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56217401 is a prime.

It is not a weakly prime, because it can be changed into another prime (56217407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28108700 + 28108701.

It is an arithmetic number, because the mean of its divisors is an integer number (28108701).

Almost surely, 2^56217401 is an apocalyptic number.

It is an amenable number.

56217401 is a deficient number, since it is larger than the sum of its proper divisors (1).

56217401 is an equidigital number, since it uses as much as digits as its factorization.

56217401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 56217401 is about 7497.8264183695. The cubic root of 56217401 is about 383.0806843493.

Adding to 56217401 its reverse (10471265), we get a palindrome (66688666).

The spelling of 56217401 in words is "fifty-six million, two hundred seventeen thousand, four hundred one".