1311303430 has 16 divisors (see below), whose sum is σ = 2484575280. Its totient is φ = 496914912.

The previous prime is 1311303419. The next prime is 1311303481. The reversal of 1311303430 is 343031131.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 1311303398 and 1311303407.

It is a congruent number.

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, 3450609 + ... + 3450988.

It is an arithmetic number, because the mean of its divisors is an integer number (155285955).

Almost surely, 2^1311303430 is an apocalyptic number.

1311303430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311303430 is a deficient number, since it is larger than the sum of its proper divisors (1173271850).

1311303430 is a wasteful number, since it uses less digits than its factorization.

1311303430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6901623.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1311303430 is about 36211.9238649371. The cubic root of 1311303430 is about 1094.5469599222.

Adding to 1311303430 its reverse (343031131), we get a palindrome (1654334561).

The spelling of 1311303430 in words is "one billion, three hundred eleven million, three hundred three thousand, four hundred thirty".