51101731 has 2 divisors, whose sum is σ = 51101732. Its totient is φ = 51101730.

The previous prime is 51101723. The next prime is 51101747. The reversal of 51101731 is 13710115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51101731 - 2³ = 51101723 is a prime.

It is a super-2 number, since 2×51101731² = 5222773822392722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51101699 and 51101708.

It is not a weakly prime, because it can be changed into another prime (51101131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550865 + 25550866.

It is an arithmetic number, because the mean of its divisors is an integer number (25550866).

Almost surely, 2^51101731 is an apocalyptic number.

51101731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101731 is an equidigital number, since it uses as much as digits as its factorization.

51101731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105, while the sum is 19.

The square root of 51101731 is about 7148.5474748371. The cubic root of 51101731 is about 371.0893898035.

Adding to 51101731 its reverse (13710115), we get a palindrome (64811846).

The spelling of 51101731 in words is "fifty-one million, one hundred one thousand, seven hundred thirty-one".