56511247 has 16 divisors (see below), whose sum is σ = 66189312. Its totient is φ = 47761920.

The previous prime is 56511239. The next prime is 56511269. The reversal of 56511247 is 74211565.

It is a cyclic number.

It is not a de Polignac number, because 56511247 - 2³ = 56511239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56511347) 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, 4722 + ... + 11632.

It is an arithmetic number, because the mean of its divisors is an integer number (4136832).

Almost surely, 2^56511247 is an apocalyptic number.

56511247 is a deficient number, since it is larger than the sum of its proper divisors (9678065).

56511247 is a wasteful number, since it uses less digits than its factorization.

56511247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its digits is 8400, while the sum is 31.

The square root of 56511247 is about 7517.3962912700. The cubic root of 56511247 is about 383.7469737018.

The spelling of 56511247 in words is "fifty-six million, five hundred eleven thousand, two hundred forty-seven".