53105531 has 4 divisors (see below), whose sum is σ = 53154192. Its totient is φ = 53056872.

The previous prime is 53105509. The next prime is 53105579. The reversal of 53105531 is 13550135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53105531 is a prime.

It is a super-2 number, since 2×53105531² = 5640394845583922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53105497 and 53105506.

It is not an unprimeable number, because it can be changed into a prime (53105131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22655 + ... + 24888.

It is an arithmetic number, because the mean of its divisors is an integer number (13288548).

Almost surely, 2^53105531 is an apocalyptic number.

53105531 is a deficient number, since it is larger than the sum of its proper divisors (48661).

53105531 is a wasteful number, since it uses less digits than its factorization.

53105531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48660.

The product of its (nonzero) digits is 1125, while the sum is 23.

The square root of 53105531 is about 7287.3541837899. The cubic root of 53105531 is about 375.8777211970.

Adding to 53105531 its reverse (13550135), we get a palindrome (66655666).

The spelling of 53105531 in words is "fifty-three million, one hundred five thousand, five hundred thirty-one".