656541143 has 4 divisors (see below), whose sum is σ = 691095960. Its totient is φ = 621986328.

The previous prime is 656541097. The next prime is 656541161. The reversal of 656541143 is 341145656.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 656541143 - 2⁶ = 656541079 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 (656541043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17277380 + ... + 17277417.

It is an arithmetic number, because the mean of its divisors is an integer number (172773990).

Almost surely, 2^656541143 is an apocalyptic number.

656541143 is a deficient number, since it is larger than the sum of its proper divisors (34554817).

656541143 is a wasteful number, since it uses less digits than its factorization.

656541143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34554816.

The product of its digits is 43200, while the sum is 35.

The square root of 656541143 is about 25623.0588142790. The cubic root of 656541143 is about 869.1351528029.

Adding to 656541143 its reverse (341145656), we get a palindrome (997686799).

The spelling of 656541143 in words is "six hundred fifty-six million, five hundred forty-one thousand, one hundred forty-three".