51134035221 has 12 divisors (see below), whose sum is σ = 74399400972. Its totient is φ = 33840528576.

The previous prime is 51134035159. The next prime is 51134035283. The reversal of 51134035221 is 12253043115.

51134035221 is a `hidden beast` number, since 5 + 1 + 134 + 0 + 3 + 522 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (51134035159) and next prime (51134035283).

It can be written as a sum of positive squares in 2 ways, for example, as 41112023121 + 10022012100 = 202761^2 + 100110^2 .

It is not a de Polignac number, because 51134035221 - 2¹⁹ = 51133510933 is a prime.

It is a super-2 number, since 2×51134035221² (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 (51134035921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20734386 + ... + 20736851.

It is an arithmetic number, because the mean of its divisors is an integer number (6199950081).

Almost surely, 2^51134035221 is an apocalyptic number.

It is an amenable number.

51134035221 is a deficient number, since it is larger than the sum of its proper divisors (23265365751).

51134035221 is a wasteful number, since it uses less digits than its factorization.

51134035221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41471380 (or 41471377 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 51134035221 its reverse (12253043115), we get a palindrome (63387078336).

The spelling of 51134035221 in words is "fifty-one billion, one hundred thirty-four million, thirty-five thousand, two hundred twenty-one".