53355531 has 4 divisors (see below), whose sum is σ = 71140712. Its totient is φ = 35570352.

The previous prime is 53355509. The next prime is 53355539. The reversal of 53355531 is 13555335.

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

It is not a de Polignac number, because 53355531 - 2⁵ = 53355499 is a prime.

It is a super-2 number, since 2×53355531² = 5693625376583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53355539) 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 in 3 ways as a sum of consecutive naturals, for example, 8892586 + ... + 8892591.

It is an arithmetic number, because the mean of its divisors is an integer number (17785178).

Almost surely, 2^53355531 is an apocalyptic number.

53355531 is a deficient number, since it is larger than the sum of its proper divisors (17785181).

53355531 is a wasteful number, since it uses less digits than its factorization.

53355531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17785180.

The product of its digits is 16875, while the sum is 30.

The square root of 53355531 is about 7304.4870456453. The cubic root of 53355531 is about 376.4666263193.

The spelling of 53355531 in words is "fifty-three million, three hundred fifty-five thousand, five hundred thirty-one".