1331213453 has 2 divisors, whose sum is σ = 1331213454. Its totient is φ = 1331213452.

The previous prime is 1331213423. The next prime is 1331213489. The reversal of 1331213453 is 3543121331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 937706884 + 393506569 = 30622^2 + 19837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331213453 - 2¹² = 1331209357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331213423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665606726 + 665606727.

It is an arithmetic number, because the mean of its divisors is an integer number (665606727).

Almost surely, 2^1331213453 is an apocalyptic number.

It is an amenable number.

1331213453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331213453 is an equidigital number, since it uses as much as digits as its factorization.

1331213453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 26.

The square root of 1331213453 is about 36485.7979630431. The cubic root of 1331213453 is about 1100.0587993362.

Adding to 1331213453 its reverse (3543121331), we get a palindrome (4874334784).

The spelling of 1331213453 in words is "one billion, three hundred thirty-one million, two hundred thirteen thousand, four hundred fifty-three".