53115691 has 2 divisors, whose sum is σ = 53115692. Its totient is φ = 53115690.

The previous prime is 53115661. The next prime is 53115703. The reversal of 53115691 is 19651135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53115691 - 2⁷ = 53115563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53115631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26557845 + 26557846.

It is an arithmetic number, because the mean of its divisors is an integer number (26557846).

Almost surely, 2^53115691 is an apocalyptic number.

53115691 is a deficient number, since it is larger than the sum of its proper divisors (1).

53115691 is an equidigital number, since it uses as much as digits as its factorization.

53115691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 31.

The square root of 53115691 is about 7288.0512484477. The cubic root of 53115691 is about 375.9016902894.

The spelling of 53115691 in words is "fifty-three million, one hundred fifteen thousand, six hundred ninety-one".