53213687 has 2 divisors, whose sum is σ = 53213688. Its totient is φ = 53213686.

The previous prime is 53213683. The next prime is 53213717. The reversal of 53213687 is 78631235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53213687 - 2² = 53213683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53213683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26606843 + 26606844.

It is an arithmetic number, because the mean of its divisors is an integer number (26606844).

Almost surely, 2^53213687 is an apocalyptic number.

53213687 is a deficient number, since it is larger than the sum of its proper divisors (1).

53213687 is an equidigital number, since it uses as much as digits as its factorization.

53213687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 53213687 is about 7294.7712095720. The cubic root of 53213687 is about 376.1327220268.

The spelling of 53213687 in words is "fifty-three million, two hundred thirteen thousand, six hundred eighty-seven".