51213233553 has 8 divisors (see below), whose sum is σ = 68285669088. Its totient is φ = 34141476864.

The previous prime is 51213233527. The next prime is 51213233563. The reversal of 51213233553 is 35533231215.

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

It is not a de Polignac number, because 51213233553 - 2¹⁴ = 51213217169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51213233563) 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, 45201 + ... + 323217.

It is an arithmetic number, because the mean of its divisors is an integer number (8535708636).

Almost surely, 2^51213233553 is an apocalyptic number.

It is an amenable number.

51213233553 is a deficient number, since it is larger than the sum of its proper divisors (17072435535).

51213233553 is a wasteful number, since it uses less digits than its factorization.

51213233553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339423.

The product of its digits is 40500, while the sum is 33.

Adding to 51213233553 its reverse (35533231215), we get a palindrome (86746464768).

The spelling of 51213233553 in words is "fifty-one billion, two hundred thirteen million, two hundred thirty-three thousand, five hundred fifty-three".