1213334551 has 8 divisors (see below), whose sum is σ = 1425456144. Its totient is φ = 1018182720.

The previous prime is 1213334539. The next prime is 1213334579. The reversal of 1213334551 is 1554333121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1213334551 - 2⁵ = 1213334519 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 (1213334531) 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, 4242286 + ... + 4242571.

It is an arithmetic number, because the mean of its divisors is an integer number (178182018).

Almost surely, 2^1213334551 is an apocalyptic number.

1213334551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213334551 is a deficient number, since it is larger than the sum of its proper divisors (212121593).

1213334551 is a wasteful number, since it uses less digits than its factorization.

1213334551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8484881.

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

The square root of 1213334551 is about 34832.9520856329. The cubic root of 1213334551 is about 1066.5802108421.

Adding to 1213334551 its reverse (1554333121), we get a palindrome (2767667672).

The spelling of 1213334551 in words is "one billion, two hundred thirteen million, three hundred thirty-four thousand, five hundred fifty-one".