56542247 has 2 divisors, whose sum is σ = 56542248. Its totient is φ = 56542246.

The previous prime is 56542231. The next prime is 56542249. The reversal of 56542247 is 74224565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56542247 - 2⁴ = 56542231 is a prime.

It is a super-3 number, since 3×56542247³ (a number of 24 digits) contains 333 as substring.

Together with 56542249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56542249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271123 + 28271124.

It is an arithmetic number, because the mean of its divisors is an integer number (28271124).

Almost surely, 2^56542247 is an apocalyptic number.

56542247 is a deficient number, since it is larger than the sum of its proper divisors (1).

56542247 is an equidigital number, since it uses as much as digits as its factorization.

56542247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 35.

The square root of 56542247 is about 7519.4578926941. The cubic root of 56542247 is about 383.8171307190.

The spelling of 56542247 in words is "fifty-six million, five hundred forty-two thousand, two hundred forty-seven".