1313022421 has 8 divisors (see below), whose sum is σ = 1390895064. Its totient is φ = 1235220480.

The previous prime is 1313022331. The next prime is 1313022437. The reversal of 1313022421 is 1242203131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 151167025 + 1161855396 = 12295^2 + 34086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313022421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313022461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23301 + ... + 56293.

It is an arithmetic number, because the mean of its divisors is an integer number (173861883).

Almost surely, 2^1313022421 is an apocalyptic number.

It is an amenable number.

1313022421 is a deficient number, since it is larger than the sum of its proper divisors (77872643).

1313022421 is a wasteful number, since it uses less digits than its factorization.

1313022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35351.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1313022421 is about 36235.6512429403. The cubic root of 1313022421 is about 1095.0250325449.

Adding to 1313022421 its reverse (1242203131), we get a palindrome (2555225552).

The spelling of 1313022421 in words is "one billion, three hundred thirteen million, twenty-two thousand, four hundred twenty-one".