51132553394209 has 27 divisors (see below), whose sum is σ = 60048105018993. Its totient is φ = 43413748492968.

The previous prime is 51132553394191. The next prime is 51132553394233. The reversal of 51132553394209 is 90249335523115.

The square root of 51132553394209 is 7150703.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 51132553394209 - 2⁴¹ = 48933530138657 is a prime.

It is a super-2 number, since 2×51132553394209² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51132553394309) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5355871774 + ... + 5355881320.

Almost surely, 2^{51132553394209} is an apocalyptic number.

51132553394209 is the 7150703-rd square number.

51132553394209 is the 3575352-nd centered octagonal number.

It is an amenable number.

51132553394209 is a deficient number, since it is larger than the sum of its proper divisors (8915551624784).

51132553394209 is an frugal number, since it uses more digits than its factorization.

51132553394209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19322 (or 9661 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 52.

The spelling of 51132553394209 in words is "fifty-one trillion, one hundred thirty-two billion, five hundred fifty-three million, three hundred ninety-four thousand, two hundred nine".