1231442330 has 16 divisors (see below), whose sum is σ = 2218315680. Its totient is φ = 492194832.

The previous prime is 1231442321. The next prime is 1231442363. The reversal of 1231442330 is 332441321.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231442296 and 1231442305.

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, 34040 + ... + 60179.

It is an arithmetic number, because the mean of its divisors is an integer number (138644730).

Almost surely, 2^1231442330 is an apocalyptic number.

1231442330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231442330 is a deficient number, since it is larger than the sum of its proper divisors (986873350).

1231442330 is a wasteful number, since it uses less digits than its factorization.

1231442330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95533.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1231442330 is about 35091.9126010538. The cubic root of 1231442330 is about 1071.8599060680.

Adding to 1231442330 its reverse (332441321), we get a palindrome (1563883651).

The spelling of 1231442330 in words is "one billion, two hundred thirty-one million, four hundred forty-two thousand, three hundred thirty".