51222501531145 has 24 divisors (see below), whose sum is σ = 71505407945664. Its totient is φ = 35122538547936.

The previous prime is 51222501531143. The next prime is 51222501531197. The reversal of 51222501531145 is 54113510522215.

It is not a de Polignac number, because 51222501531145 - 2¹ = 51222501531143 is a prime.

It is a super-2 number, since 2×51222501531145² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51222501531143) 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 23 ways as a sum of consecutive naturals, for example, 1559692 + ... + 10240978.

It is an arithmetic number, because the mean of its divisors is an integer number (2979391997736).

Almost surely, 2^{51222501531145} is an apocalyptic number.

It is an amenable number.

51222501531145 is a deficient number, since it is larger than the sum of its proper divisors (20282906414519).

51222501531145 is a wasteful number, since it uses less digits than its factorization.

51222501531145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8705389 (or 8705382 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 51222501531145 in words is "fifty-one trillion, two hundred twenty-two billion, five hundred one million, five hundred thirty-one thousand, one hundred forty-five".