56864551 has 2 divisors, whose sum is σ = 56864552. Its totient is φ = 56864550.

The previous prime is 56864491. The next prime is 56864569. The reversal of 56864551 is 15546865.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56864551 - 2¹⁵ = 56831783 is a prime.

It is equal to p_3386875 and since 56864551 and 3386875 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56864351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28432275 + 28432276.

It is an arithmetic number, because the mean of its divisors is an integer number (28432276).

Almost surely, 2^56864551 is an apocalyptic number.

56864551 is a deficient number, since it is larger than the sum of its proper divisors (1).

56864551 is an equidigital number, since it uses as much as digits as its factorization.

56864551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 40.

The square root of 56864551 is about 7540.8587707237. The cubic root of 56864551 is about 384.5450317956.

The spelling of 56864551 in words is "fifty-six million, eight hundred sixty-four thousand, five hundred fifty-one".