53219987 has 2 divisors, whose sum is σ = 53219988. Its totient is φ = 53219986.

The previous prime is 53219977. The next prime is 53220001. The reversal of 53219987 is 78991235.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53219987 - 2¹⁸ = 52957843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53219917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26609993 + 26609994.

It is an arithmetic number, because the mean of its divisors is an integer number (26609994).

Almost surely, 2^53219987 is an apocalyptic number.

53219987 is a deficient number, since it is larger than the sum of its proper divisors (1).

53219987 is an equidigital number, since it uses as much as digits as its factorization.

53219987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 53219987 is about 7295.2030129394. The cubic root of 53219987 is about 376.1475649665.

The spelling of 53219987 in words is "fifty-three million, two hundred nineteen thousand, nine hundred eighty-seven".