51101521447 has 2 divisors, whose sum is σ = 51101521448. Its totient is φ = 51101521446.

The previous prime is 51101521409. The next prime is 51101521481. The reversal of 51101521447 is 74412510115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51101521447 is a prime.

It is a super-2 number, since 2×51101521447² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51101521147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550760723 + 25550760724.

It is an arithmetic number, because the mean of its divisors is an integer number (25550760724).

Almost surely, 2^51101521447 is an apocalyptic number.

51101521447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101521447 is an equidigital number, since it uses as much as digits as its factorization.

51101521447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The spelling of 51101521447 in words is "fifty-one billion, one hundred one million, five hundred twenty-one thousand, four hundred forty-seven".