56947551 has 8 divisors (see below), whose sum is σ = 77982384. Its totient is φ = 36938880.

The previous prime is 56947531. The next prime is 56947571. The reversal of 56947551 is 15574965.

It is an interprime number because it is at equal distance from previous prime (56947531) and next prime (56947571).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56947551 - 2¹³ = 56939359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56947531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256410 + ... + 256631.

It is an arithmetic number, because the mean of its divisors is an integer number (9747798).

Almost surely, 2^56947551 is an apocalyptic number.

56947551 is a deficient number, since it is larger than the sum of its proper divisors (21034833).

56947551 is a wasteful number, since it uses less digits than its factorization.

56947551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513081.

The product of its digits is 189000, while the sum is 42.

The square root of 56947551 is about 7546.3601159764. The cubic root of 56947551 is about 384.7320359471.

The spelling of 56947551 in words is "fifty-six million, nine hundred forty-seven thousand, five hundred fifty-one".