1213431330 has 16 divisors (see below), whose sum is σ = 2912235264. Its totient is φ = 323581680.

The previous prime is 1213431301. The next prime is 1213431353. The reversal of 1213431330 is 331343121.

It is a junction number, because it is equal to n+sod(n) for n = 1213431297 and 1213431306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20223826 + ... + 20223885.

It is an arithmetic number, because the mean of its divisors is an integer number (182014704).

Almost surely, 2^1213431330 is an apocalyptic number.

1213431330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213431330 is an abundant number, since it is smaller than the sum of its proper divisors (1698803934).

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

1213431330 is a wasteful number, since it uses less digits than its factorization.

1213431330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40447721.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1213431330 is about 34834.3412453860. The cubic root of 1213431330 is about 1066.6085679076.

Adding to 1213431330 its reverse (331343121), we get a palindrome (1544774451).

The spelling of 1213431330 in words is "one billion, two hundred thirteen million, four hundred thirty-one thousand, three hundred thirty".