51755731 has 2 divisors, whose sum is σ = 51755732. Its totient is φ = 51755730.

The previous prime is 51755659. The next prime is 51755741. The reversal of 51755731 is 13755715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51755731 - 2⁹ = 51755219 is a prime.

It is a super-2 number, since 2×51755731² = 5357311382688722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51755741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25877865 + 25877866.

It is an arithmetic number, because the mean of its divisors is an integer number (25877866).

Almost surely, 2^51755731 is an apocalyptic number.

51755731 is a deficient number, since it is larger than the sum of its proper divisors (1).

51755731 is an equidigital number, since it uses as much as digits as its factorization.

51755731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18375, while the sum is 34.

The square root of 51755731 is about 7194.1456059771. The cubic root of 51755731 is about 372.6657514977.

The spelling of 51755731 in words is "fifty-one million, seven hundred fifty-five thousand, seven hundred thirty-one".