1313220404 has 6 divisors (see below), whose sum is σ = 2298135714. Its totient is φ = 656610200.

The previous prime is 1313220371. The next prime is 1313220409. The reversal of 1313220404 is 4040223131.

It can be written as a sum of positive squares in only one way, i.e., 1101576100 + 211644304 = 33190^2 + 14548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313220409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164152547 + ... + 164152554.

It is an arithmetic number, because the mean of its divisors is an integer number (383022619).

Almost surely, 2^1313220404 is an apocalyptic number.

It is an amenable number.

1313220404 is a deficient number, since it is larger than the sum of its proper divisors (984915310).

1313220404 is a wasteful number, since it uses less digits than its factorization.

1313220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328305105 (or 328305103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1313220404 is about 36238.3830213215. The cubic root of 1313220404 is about 1095.0800672602.

Adding to 1313220404 its reverse (4040223131), we get a palindrome (5353443535).

The spelling of 1313220404 in words is "one billion, three hundred thirteen million, two hundred twenty thousand, four hundred four".