1231344330 has 32 divisors (see below), whose sum is σ = 3083716224. Its totient is φ = 314081856.

The previous prime is 1231344329. The next prime is 1231344341. The reversal of 1231344330 is 334431321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231344330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891589 + ... + 892968.

It is an arithmetic number, because the mean of its divisors is an integer number (96366132).

Almost surely, 2^1231344330 is an apocalyptic number.

1231344330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231344330 is an abundant number, since it is smaller than the sum of its proper divisors (1852371894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231344330 is a wasteful number, since it uses less digits than its factorization.

1231344330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784590.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1231344330 is about 35090.5162401467. The cubic root of 1231344330 is about 1071.8314719154.

Adding to 1231344330 its reverse (334431321), we get a palindrome (1565775651).

The spelling of 1231344330 in words is "one billion, two hundred thirty-one million, three hundred forty-four thousand, three hundred thirty".