56706551 has 16 divisors (see below), whose sum is σ = 63980928. Its totient is φ = 49812000.

The previous prime is 56706541. The next prime is 56706557. The reversal of 56706551 is 15560765.

It is a cyclic number.

It is not a de Polignac number, because 56706551 - 2¹⁸ = 56444407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56706557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47180 + ... + 48366.

It is an arithmetic number, because the mean of its divisors is an integer number (3998808).

Almost surely, 2^56706551 is an apocalyptic number.

56706551 is a deficient number, since it is larger than the sum of its proper divisors (7274377).

56706551 is a wasteful number, since it uses less digits than its factorization.

56706551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 56706551 is about 7530.3752230550. The cubic root of 56706551 is about 384.1885444716.

It can be divided in two parts, 5670 and 6551, that added together give a palindrome (12221).

The spelling of 56706551 in words is "fifty-six million, seven hundred six thousand, five hundred fifty-one".