1315211646 has 48 divisors (see below), whose sum is σ = 3063553920. Its totient is φ = 375323760.

The previous prime is 1315211641. The next prime is 1315211663. The reversal of 1315211646 is 6461125131.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315211641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300945 + ... + 305283.

It is an arithmetic number, because the mean of its divisors is an integer number (63824040).

Almost surely, 2^1315211646 is an apocalyptic number.

1315211646 is an abundant number, since it is smaller than the sum of its proper divisors (1748342274).

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

1315211646 is a wasteful number, since it uses less digits than its factorization.

1315211646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389 (or 5382 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 1315211646 is about 36265.8468259049. The cubic root of 1315211646 is about 1095.6332793508.

Adding to 1315211646 its reverse (6461125131), we get a palindrome (7776336777).

The spelling of 1315211646 in words is "one billion, three hundred fifteen million, two hundred eleven thousand, six hundred forty-six".