1020161313 has 12 divisors (see below), whose sum is σ = 1560246948. Its totient is φ = 640101120.

The previous prime is 1020161309. The next prime is 1020161323. The reversal of 1020161313 is 3131610201.

It can be written as a sum of positive squares in 2 ways, for example, as 661929984 + 358231329 = 25728^2 + 18927^2 .

It is not a de Polignac number, because 1020161313 - 2² = 1020161309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020161323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333708 + ... + 3334013.

It is an arithmetic number, because the mean of its divisors is an integer number (130020579).

Almost surely, 2^1020161313 is an apocalyptic number.

It is an amenable number.

1020161313 is a deficient number, since it is larger than the sum of its proper divisors (540085635).

1020161313 is a wasteful number, since it uses less digits than its factorization.

1020161313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667744 (or 6667741 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1020161313 is about 31939.9641984771. The cubic root of 1020161313 is about 1006.6757725567.

Adding to 1020161313 its reverse (3131610201), we get a palindrome (4151771514).

The spelling of 1020161313 in words is "one billion, twenty million, one hundred sixty-one thousand, three hundred thirteen".