53235891 has 24 divisors (see below), whose sum is σ = 85709520. Its totient is φ = 31643136.

The previous prime is 53235863. The next prime is 53235943. The reversal of 53235891 is 19853235.

53235891 is a `hidden beast` number, since 53 + 23 + 589 + 1 = 666.

It is not a de Polignac number, because 53235891 - 2⁹ = 53235379 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53235811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6250 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (3571230).

Almost surely, 2^53235891 is an apocalyptic number.

53235891 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

53235891 is a deficient number, since it is larger than the sum of its proper divisors (32473629).

53235891 is a wasteful number, since it uses less digits than its factorization.

53235891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355 (or 18352 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 53235891 is about 7296.2929628682. The cubic root of 53235891 is about 376.1850299329.

The spelling of 53235891 in words is "fifty-three million, two hundred thirty-five thousand, eight hundred ninety-one".