51140533213 has 48 divisors (see below), whose sum is σ = 65656789632. Its totient is φ = 38694240000.

The previous prime is 51140533207. The next prime is 51140533229. The reversal of 51140533213 is 31233504115.

It is a happy number.

It is not a de Polignac number, because 51140533213 - 2⁵ = 51140533181 is a prime.

It is a super-4 number, since 4×51140533213⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140537213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21844423 + ... + 21846763.

It is an arithmetic number, because the mean of its divisors is an integer number (1367849784).

Almost surely, 2^51140533213 is an apocalyptic number.

51140533213 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51140533213 is a deficient number, since it is larger than the sum of its proper divisors (14516256419).

51140533213 is a wasteful number, since it uses less digits than its factorization.

51140533213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566 (or 2513 counting only the distinct ones).

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

The spelling of 51140533213 in words is "fifty-one billion, one hundred forty million, five hundred thirty-three thousand, two hundred thirteen".