53643731 has 2 divisors, whose sum is σ = 53643732. Its totient is φ = 53643730.

The previous prime is 53643719. The next prime is 53643757. The reversal of 53643731 is 13734635.

53643731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53643731 - 2¹⁴ = 53627347 is a prime.

It is a super-2 number, since 2×53643731² = 5755299751200722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53643781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26821865 + 26821866.

It is an arithmetic number, because the mean of its divisors is an integer number (26821866).

Almost surely, 2^53643731 is an apocalyptic number.

53643731 is a deficient number, since it is larger than the sum of its proper divisors (1).

53643731 is an equidigital number, since it uses as much as digits as its factorization.

53643731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 32.

The square root of 53643731 is about 7324.1880778691. The cubic root of 53643731 is about 377.1432379322.

The spelling of 53643731 in words is "fifty-three million, six hundred forty-three thousand, seven hundred thirty-one".