56542231 has 2 divisors, whose sum is σ = 56542232. Its totient is φ = 56542230.

The previous prime is 56542219. The next prime is 56542247. The reversal of 56542231 is 13224565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56542231 - 2¹⁹ = 56017943 is a prime.

It is a super-2 number, since 2×56542231² = 6394047772914722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56542231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56542531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28271115 + 28271116.

It is an arithmetic number, because the mean of its divisors is an integer number (28271116).

Almost surely, 2^56542231 is an apocalyptic number.

56542231 is a deficient number, since it is larger than the sum of its proper divisors (1).

56542231 is an equidigital number, since it uses as much as digits as its factorization.

56542231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 56542231 is about 7519.4568287876. The cubic root of 56542231 is about 383.8170945155.

Adding to 56542231 its reverse (13224565), we get a palindrome (69766796).

The spelling of 56542231 in words is "fifty-six million, five hundred forty-two thousand, two hundred thirty-one".