656421130 has 16 divisors (see below), whose sum is σ = 1181860704. Its totient is φ = 262501200.

The previous prime is 656421113. The next prime is 656421133. The reversal of 656421130 is 31124656.

It is a super-3 number, since 3×656421130³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (656421133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56305 + ... + 66955.

It is an arithmetic number, because the mean of its divisors is an integer number (73866294).

Almost surely, 2^656421130 is an apocalyptic number.

656421130 is a deficient number, since it is larger than the sum of its proper divisors (525439574).

656421130 is a wasteful number, since it uses less digits than its factorization.

656421130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16821.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 656421130 is about 25620.7168127670. The cubic root of 656421130 is about 869.0821914744.

Adding to 656421130 its reverse (31124656), we get a palindrome (687545786).

The spelling of 656421130 in words is "six hundred fifty-six million, four hundred twenty-one thousand, one hundred thirty".