612131330 has 32 divisors (see below), whose sum is σ = 1133459136. Its totient is φ = 237847104.

The previous prime is 612131327. The next prime is 612131339. The reversal of 612131330 is 33131216.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (612131339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349517 + ... + 351263.

It is an arithmetic number, because the mean of its divisors is an integer number (35420598).

Almost surely, 2^612131330 is an apocalyptic number.

612131330 is a deficient number, since it is larger than the sum of its proper divisors (521327806).

612131330 is a wasteful number, since it uses less digits than its factorization.

612131330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 612131330 is about 24741.2879616240. The cubic root of 612131330 is about 849.0792012509.

Adding to 612131330 its reverse (33131216), we get a palindrome (645262546).

The spelling of 612131330 in words is "six hundred twelve million, one hundred thirty-one thousand, three hundred thirty".