53555331 has 4 divisors (see below), whose sum is σ = 71407112. Its totient is φ = 35703552.

The previous prime is 53555309. The next prime is 53555401. The reversal of 53555331 is 13355535.

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

It is not a de Polignac number, because 53555331 - 2⁶ = 53555267 is a prime.

It is a super-2 number, since 2×53555331² = 5736346957039122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53550331) 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, 8925886 + ... + 8925891.

It is an arithmetic number, because the mean of its divisors is an integer number (17851778).

Almost surely, 2^53555331 is an apocalyptic number.

53555331 is a deficient number, since it is larger than the sum of its proper divisors (17851781).

53555331 is a wasteful number, since it uses less digits than its factorization.

53555331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17851780.

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

The square root of 53555331 is about 7318.1507910127. The cubic root of 53555331 is about 376.9359580888.

The spelling of 53555331 in words is "fifty-three million, five hundred fifty-five thousand, three hundred thirty-one".