1343213551 has 8 divisors (see below), whose sum is σ = 1352874608. Its totient is φ = 1333584000.

The previous prime is 1343213549. The next prime is 1343213563. The reversal of 1343213551 is 1553123431.

1343213551 = T₂₉₉₂₃ + T₂₉₉₂₄ + T₂₉₉₂₅.

It is a happy number.

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

It is a 7-Lehmer number, since φ(1343213551) divides (1343213551-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 1343213551 - 2¹ = 1343213549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343213581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81271 + ... + 96391.

It is an arithmetic number, because the mean of its divisors is an integer number (169109326).

Almost surely, 2^1343213551 is an apocalyptic number.

1343213551 is the 29925-th centered triangular number.

1343213551 is a deficient number, since it is larger than the sum of its proper divisors (9661057).

1343213551 is a wasteful number, since it uses less digits than its factorization.

1343213551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15753.

The product of its digits is 5400, while the sum is 28.

The square root of 1343213551 is about 36649.8779124842. The cubic root of 1343213551 is about 1103.3543752636.

Adding to 1343213551 its reverse (1553123431), we get a palindrome (2896336982).

The spelling of 1343213551 in words is "one billion, three hundred forty-three million, two hundred thirteen thousand, five hundred fifty-one".