51145533213 has 8 divisors (see below), whose sum is σ = 68494459488. Its totient is φ = 33946814544.

The previous prime is 51145533203. The next prime is 51145533221. The reversal of 51145533213 is 31233554115.

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

It is not a de Polignac number, because 51145533213 - 2¹³ = 51145525021 is a prime.

It is a super-2 number, since 2×51145533213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145533203) 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, 37551106 + ... + 37552467.

It is an arithmetic number, because the mean of its divisors is an integer number (8561807436).

Almost surely, 2^51145533213 is an apocalyptic number.

It is an amenable number.

51145533213 is a deficient number, since it is larger than the sum of its proper divisors (17348926275).

51145533213 is a wasteful number, since it uses less digits than its factorization.

51145533213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75103803.

The product of its digits is 27000, while the sum is 33.

The spelling of 51145533213 in words is "fifty-one billion, one hundred forty-five million, five hundred thirty-three thousand, two hundred thirteen".