53515999 has 2 divisors, whose sum is σ = 53516000. Its totient is φ = 53515998.

The previous prime is 53515927. The next prime is 53516011. The reversal of 53515999 is 99951535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53515999 - 2⁹ = 53515487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53515909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26757999 + 26758000.

It is an arithmetic number, because the mean of its divisors is an integer number (26758000).

Almost surely, 2^53515999 is an apocalyptic number.

53515999 is a deficient number, since it is larger than the sum of its proper divisors (1).

53515999 is an equidigital number, since it uses as much as digits as its factorization.

53515999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 273375, while the sum is 46.

The square root of 53515999 is about 7315.4630065362. The cubic root of 53515999 is about 376.8436593035.

The spelling of 53515999 in words is "fifty-three million, five hundred fifteen thousand, nine hundred ninety-nine".