1313022020 has 12 divisors (see below), whose sum is σ = 2757346284. Its totient is φ = 525208800.

The previous prime is 1313022017. The next prime is 1313022023. The reversal of 1313022020 is 202203131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1313022017) and next prime (1313022023).

It can be written as a sum of positive squares in 2 ways, for example, as 454883584 + 858138436 = 21328^2 + 29294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1313021986 and 1313022004.

It is not an unprimeable number, because it can be changed into a prime (1313022023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32825531 + ... + 32825570.

It is an arithmetic number, because the mean of its divisors is an integer number (229778857).

Almost surely, 2^1313022020 is an apocalyptic number.

1313022020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313022020 is an abundant number, since it is smaller than the sum of its proper divisors (1444324264).

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

1313022020 is a wasteful number, since it uses less digits than its factorization.

1313022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65651110 (or 65651108 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1313022020 is about 36235.6457097152. The cubic root of 1313022020 is about 1095.0249210705.

Adding to 1313022020 its reverse (202203131), we get a palindrome (1515225151).

The spelling of 1313022020 in words is "one billion, three hundred thirteen million, twenty-two thousand, twenty".