53115511 has 2 divisors, whose sum is σ = 53115512. Its totient is φ = 53115510.

The previous prime is 53115481. The next prime is 53115527. The reversal of 53115511 is 11551135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53115511 - 2⁷ = 53115383 is a prime.

It is a super-2 number, since 2×53115511² = 5642515017582242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53112511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26557755 + 26557756.

It is an arithmetic number, because the mean of its divisors is an integer number (26557756).

Almost surely, 2^53115511 is an apocalyptic number.

53115511 is a deficient number, since it is larger than the sum of its proper divisors (1).

53115511 is an equidigital number, since it uses as much as digits as its factorization.

53115511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 375, while the sum is 22.

The square root of 53115511 is about 7288.0388994571. The cubic root of 53115511 is about 375.9012656667.

Adding to 53115511 its reverse (11551135), we get a palindrome (64666646).

The spelling of 53115511 in words is "fifty-three million, one hundred fifteen thousand, five hundred eleven".