51213241443 has 32 divisors (see below), whose sum is σ = 84137389056. Its totient is φ = 26982995328.

The previous prime is 51213241367. The next prime is 51213241463. The reversal of 51213241443 is 34414231215.

It is not a de Polignac number, because 51213241443 - 2¹² = 51213237347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51213241443.

It is not an unprimeable number, because it can be changed into a prime (51213241463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136405 + ... + 347897.

It is an arithmetic number, because the mean of its divisors is an integer number (2629293408).

Almost surely, 2^51213241443 is an apocalyptic number.

51213241443 is a deficient number, since it is larger than the sum of its proper divisors (32924147613).

51213241443 is a wasteful number, since it uses less digits than its factorization.

51213241443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212403.

The product of its digits is 11520, while the sum is 30.

Adding to 51213241443 its reverse (34414231215), we get a palindrome (85627472658).

The spelling of 51213241443 in words is "fifty-one billion, two hundred thirteen million, two hundred forty-one thousand, four hundred forty-three".