53555231 has 4 divisors (see below), whose sum is σ = 54694752. Its totient is φ = 52415712.

The previous prime is 53555123. The next prime is 53555233. The reversal of 53555231 is 13255535.

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

It is a cyclic number.

It is not a de Polignac number, because 53555231 - 2¹⁴ = 53538847 is a prime.

It is a super-2 number, since 2×53555231² = 5736325534926722, 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 = 53555194 and 53555203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53555233) 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, 569690 + ... + 569783.

It is an arithmetic number, because the mean of its divisors is an integer number (13673688).

Almost surely, 2^53555231 is an apocalyptic number.

53555231 is a deficient number, since it is larger than the sum of its proper divisors (1139521).

53555231 is a wasteful number, since it uses less digits than its factorization.

53555231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139520.

The product of its digits is 11250, while the sum is 29.

The square root of 53555231 is about 7318.1439586824. The cubic root of 53555231 is about 376.9357234802.

The spelling of 53555231 in words is "fifty-three million, five hundred fifty-five thousand, two hundred thirty-one".