53512391 has 2 divisors, whose sum is σ = 53512392. Its totient is φ = 53512390.

The previous prime is 53512387. The next prime is 53512399. The reversal of 53512391 is 19321535.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53512391 - 2² = 53512387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53512399) 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, 26756195 + 26756196.

It is an arithmetic number, because the mean of its divisors is an integer number (26756196).

Almost surely, 2^53512391 is an apocalyptic number.

53512391 is a deficient number, since it is larger than the sum of its proper divisors (1).

53512391 is an equidigital number, since it uses as much as digits as its factorization.

53512391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 29.

The square root of 53512391 is about 7315.2164014471. The cubic root of 53512391 is about 376.8351902942.

The spelling of 53512391 in words is "fifty-three million, five hundred twelve thousand, three hundred ninety-one".