1311263350 has 48 divisors (see below), whose sum is σ = 2613859488. Its totient is φ = 488125440.

The previous prime is 1311263347. The next prime is 1311263383. The reversal of 1311263350 is 533621131.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27142 + ... + 57958.

It is an arithmetic number, because the mean of its divisors is an integer number (54455406).

Almost surely, 2^1311263350 is an apocalyptic number.

1311263350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311263350 is a deficient number, since it is larger than the sum of its proper divisors (1302596138).

1311263350 is a wasteful number, since it uses less digits than its factorization.

1311263350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30889 (or 30884 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1311263350 is about 36211.3704518346. The cubic root of 1311263350 is about 1094.5358081963.

Adding to 1311263350 its reverse (533621131), we get a palindrome (1844884481).

The spelling of 1311263350 in words is "one billion, three hundred eleven million, two hundred sixty-three thousand, three hundred fifty".