51147934441 has 2 divisors, whose sum is σ = 51147934442. Its totient is φ = 51147934440.

The previous prime is 51147934429. The next prime is 51147934447. The reversal of 51147934441 is 14443974115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43332667225 + 7815267216 = 208165^2 + 88404^2 .

It is a cyclic number.

It is not a de Polignac number, because 51147934441 - 2³³ = 42557999849 is a prime.

It is a super-2 number, since 2×51147934441² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51147934447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25573967220 + 25573967221.

It is an arithmetic number, because the mean of its divisors is an integer number (25573967221).

Almost surely, 2^51147934441 is an apocalyptic number.

It is an amenable number.

51147934441 is a deficient number, since it is larger than the sum of its proper divisors (1).

51147934441 is an equidigital number, since it uses as much as digits as its factorization.

51147934441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The spelling of 51147934441 in words is "fifty-one billion, one hundred forty-seven million, nine hundred thirty-four thousand, four hundred forty-one".